diff --git a/apps/settings/tests/Mailer/NewUserMailHelperTest.php b/apps/settings/tests/Mailer/NewUserMailHelperTest.php
index 72af678f832..2f9f7bcba7b 100644
--- a/apps/settings/tests/Mailer/NewUserMailHelperTest.php
+++ b/apps/settings/tests/Mailer/NewUserMailHelperTest.php
@@ -259,26 +259,26 @@ class NewUserMailHelperTest extends TestCase {
 				<tr style="padding:0;text-align:left;vertical-align:top">
 					<th style="Margin:0;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;padding:0;text-align:left">
 						<center data-parsed="" style="min-width:490px;width:100%">
-							<table class="button btn default primary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;margin:0 0 30px 0;margin-right:15px;max-height:60px;max-width:300px;padding:0;text-align:center;vertical-align:top;width:auto;background:;background-color:;color:#fefefe;">
+							<table class="button btn default primary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;margin:0 0 30px 0;margin-right:15px;border-radius:8px;max-width:300px;padding:0;text-align:center;vertical-align:top;width:auto;background:;background-color:;color:#fefefe;">
 								<tr style="padding:0;text-align:left;vertical-align:top">
-									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
 											<tr style="padding:0;text-align:left;vertical-align:top">
-												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border:0 solid ;border-collapse:collapse!important;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
-													<a href="https://example.com/resetPassword/MySuperLongSecureRandomToken" style="Margin:0;border:0 solid ;border-radius:2px;color:#ffffff;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:1.3;margin:0;padding:10px 25px 10px 25px;text-align:left;outline:1px solid #ffffff;text-decoration:none">Set your password</a>
+												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border:0 solid ;border-collapse:collapse!important;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+													<a href="https://example.com/resetPassword/MySuperLongSecureRandomToken" style="Margin:0;border:0 solid ;color:#ffffff;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:normal;margin:0;padding:8px;text-align:left;outline:1px solid #ffffff;text-decoration:none">Set your password</a>
 												</td>
 											</tr>
 										</table>
 									</td>
 								</tr>
 							</table>
-							<table class="button btn default secondary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;margin:0 0 30px 0;max-height:40px;max-width:300px;padding:0;text-align:center;vertical-align:top;width:auto">
+							<table class="button btn default secondary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;background-color: #ccc;margin:0 0 30px 0;max-height:40px;max-width:300px;padding:1px;border-radius:8px;text-align:center;vertical-align:top;width:auto">
 								<tr style="padding:0;text-align:left;vertical-align:top">
-									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
 											<tr style="padding:0;text-align:left;vertical-align:top">
-												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;background:#777;border:0 solid #777;border-collapse:collapse!important;color:#fefefe;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
-													<a href="https://nextcloud.com/install/#install-clients" style="Margin:0;background-color:#fff;border:0 solid #777;border-radius:2px;color:#6C6C6C!important;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:1.3;margin:0;outline:1px solid #CBCBCB;padding:10px 25px 10px 25px;text-align:left;text-decoration:none">Install Client</a>
+												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border:0 solid #777;border-collapse:collapse!important;color:#fefefe;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+													<a href="https://nextcloud.com/install/#install-clients" style="Margin:0;background-color:#fff;border:0 solid #777;color:#6C6C6C!important;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:normal;margin:0;border-radius: 7px;padding:8px;text-align:left;text-decoration:none">Install Client</a>
 												</td>
 											</tr>
 										</table>
@@ -495,26 +495,26 @@ EOF;
 				<tr style="padding:0;text-align:left;vertical-align:top">
 					<th style="Margin:0;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;padding:0;text-align:left">
 						<center data-parsed="" style="min-width:490px;width:100%">
-							<table class="button btn default primary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;margin:0 0 30px 0;margin-right:15px;max-height:60px;max-width:300px;padding:0;text-align:center;vertical-align:top;width:auto;background:;background-color:;color:#fefefe;">
+							<table class="button btn default primary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;margin:0 0 30px 0;margin-right:15px;border-radius:8px;max-width:300px;padding:0;text-align:center;vertical-align:top;width:auto;background:;background-color:;color:#fefefe;">
 								<tr style="padding:0;text-align:left;vertical-align:top">
-									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
 											<tr style="padding:0;text-align:left;vertical-align:top">
-												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border:0 solid ;border-collapse:collapse!important;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
-													<a href="https://example.com/" style="Margin:0;border:0 solid ;border-radius:2px;color:#ffffff;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:1.3;margin:0;padding:10px 25px 10px 25px;text-align:left;outline:1px solid #ffffff;text-decoration:none">Go to TestCloud</a>
+												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border:0 solid ;border-collapse:collapse!important;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+													<a href="https://example.com/" style="Margin:0;border:0 solid ;color:#ffffff;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:normal;margin:0;padding:8px;text-align:left;outline:1px solid #ffffff;text-decoration:none">Go to TestCloud</a>
 												</td>
 											</tr>
 										</table>
 									</td>
 								</tr>
 							</table>
-							<table class="button btn default secondary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;margin:0 0 30px 0;max-height:40px;max-width:300px;padding:0;text-align:center;vertical-align:top;width:auto">
+							<table class="button btn default secondary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;background-color: #ccc;margin:0 0 30px 0;max-height:40px;max-width:300px;padding:1px;border-radius:8px;text-align:center;vertical-align:top;width:auto">
 								<tr style="padding:0;text-align:left;vertical-align:top">
-									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
 											<tr style="padding:0;text-align:left;vertical-align:top">
-												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;background:#777;border:0 solid #777;border-collapse:collapse!important;color:#fefefe;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
-													<a href="https://nextcloud.com/install/#install-clients" style="Margin:0;background-color:#fff;border:0 solid #777;border-radius:2px;color:#6C6C6C!important;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:1.3;margin:0;outline:1px solid #CBCBCB;padding:10px 25px 10px 25px;text-align:left;text-decoration:none">Install Client</a>
+												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border:0 solid #777;border-collapse:collapse!important;color:#fefefe;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+													<a href="https://nextcloud.com/install/#install-clients" style="Margin:0;background-color:#fff;border:0 solid #777;color:#6C6C6C!important;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:normal;margin:0;border-radius: 7px;padding:8px;text-align:left;text-decoration:none">Install Client</a>
 												</td>
 											</tr>
 										</table>
@@ -720,26 +720,26 @@ EOF;
 				<tr style="padding:0;text-align:left;vertical-align:top">
 					<th style="Margin:0;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;padding:0;text-align:left">
 						<center data-parsed="" style="min-width:490px;width:100%">
-							<table class="button btn default primary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;margin:0 0 30px 0;margin-right:15px;max-height:60px;max-width:300px;padding:0;text-align:center;vertical-align:top;width:auto;background:;background-color:;color:#fefefe;">
+							<table class="button btn default primary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;margin:0 0 30px 0;margin-right:15px;border-radius:8px;max-width:300px;padding:0;text-align:center;vertical-align:top;width:auto;background:;background-color:;color:#fefefe;">
 								<tr style="padding:0;text-align:left;vertical-align:top">
-									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
 											<tr style="padding:0;text-align:left;vertical-align:top">
-												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border:0 solid ;border-collapse:collapse!important;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
-													<a href="https://example.com/" style="Margin:0;border:0 solid ;border-radius:2px;color:#ffffff;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:1.3;margin:0;padding:10px 25px 10px 25px;text-align:left;outline:1px solid #ffffff;text-decoration:none">Go to TestCloud</a>
+												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border:0 solid ;border-collapse:collapse!important;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+													<a href="https://example.com/" style="Margin:0;border:0 solid ;color:#ffffff;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:normal;margin:0;padding:8px;text-align:left;outline:1px solid #ffffff;text-decoration:none">Go to TestCloud</a>
 												</td>
 											</tr>
 										</table>
 									</td>
 								</tr>
 							</table>
-							<table class="button btn default secondary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;margin:0 0 30px 0;max-height:40px;max-width:300px;padding:0;text-align:center;vertical-align:top;width:auto">
+							<table class="button btn default secondary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;background-color: #ccc;margin:0 0 30px 0;max-height:40px;max-width:300px;padding:1px;border-radius:8px;text-align:center;vertical-align:top;width:auto">
 								<tr style="padding:0;text-align:left;vertical-align:top">
-									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
 											<tr style="padding:0;text-align:left;vertical-align:top">
-												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;background:#777;border:0 solid #777;border-collapse:collapse!important;color:#fefefe;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
-													<a href="https://nextcloud.com/install/#install-clients" style="Margin:0;background-color:#fff;border:0 solid #777;border-radius:2px;color:#6C6C6C!important;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:1.3;margin:0;outline:1px solid #CBCBCB;padding:10px 25px 10px 25px;text-align:left;text-decoration:none">Install Client</a>
+												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border:0 solid #777;border-collapse:collapse!important;color:#fefefe;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+													<a href="https://nextcloud.com/install/#install-clients" style="Margin:0;background-color:#fff;border:0 solid #777;color:#6C6C6C!important;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:normal;margin:0;border-radius: 7px;padding:8px;text-align:left;text-decoration:none">Install Client</a>
 												</td>
 											</tr>
 										</table>
diff --git a/tests/data/emails/new-account-email-custom.html b/tests/data/emails/new-account-email-custom.html
index 370a2f749d7..990c4dc48e8 100644
--- a/tests/data/emails/new-account-email-custom.html
+++ b/tests/data/emails/new-account-email-custom.html
@@ -107,26 +107,26 @@
 				<tr style="padding:0;text-align:left;vertical-align:top">
 					<th style="Margin:0;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;padding:0;text-align:left">
 						<center data-parsed="" style="min-width:490px;width:100%">
-							<table class="button btn default primary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;margin:0 0 30px 0;margin-right:15px;max-height:60px;max-width:300px;padding:0;text-align:center;vertical-align:top;width:auto;background:#0082c9;background-color:#0082c9;color:#fefefe;">
+							<table class="button btn default primary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;margin:0 0 30px 0;margin-right:15px;border-radius:8px;max-width:300px;padding:0;text-align:center;vertical-align:top;width:auto;background:#0082c9;background-color:#0082c9;color:#fefefe;">
 								<tr style="padding:0;text-align:left;vertical-align:top">
-									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
 											<tr style="padding:0;text-align:left;vertical-align:top">
-												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border:0 solid #0082c9;border-collapse:collapse!important;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
-													<a href="https://example.org/resetPassword/123" style="Margin:0;border:0 solid #0082c9;border-radius:2px;color:#ffffff;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:1.3;margin:0;padding:10px 25px 10px 25px;text-align:left;outline:1px solid #ffffff;text-decoration:none">Set your password</a>
+												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border:0 solid #0082c9;border-collapse:collapse!important;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+													<a href="https://example.org/resetPassword/123" style="Margin:0;border:0 solid #0082c9;color:#ffffff;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:normal;margin:0;padding:8px;text-align:left;outline:1px solid #ffffff;text-decoration:none">Set your password</a>
 												</td>
 											</tr>
 										</table>
 									</td>
 								</tr>
 							</table>
-							<table class="button btn default secondary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;margin:0 0 30px 0;max-height:40px;max-width:300px;padding:0;text-align:center;vertical-align:top;width:auto">
+							<table class="button btn default secondary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;background-color: #ccc;margin:0 0 30px 0;max-height:40px;max-width:300px;padding:1px;border-radius:8px;text-align:center;vertical-align:top;width:auto">
 								<tr style="padding:0;text-align:left;vertical-align:top">
-									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
 											<tr style="padding:0;text-align:left;vertical-align:top">
-												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;background:#777;border:0 solid #777;border-collapse:collapse!important;color:#fefefe;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
-													<a href="https://nextcloud.com/install/#install-clients" style="Margin:0;background-color:#fff;border:0 solid #777;border-radius:2px;color:#6C6C6C!important;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:1.3;margin:0;outline:1px solid #CBCBCB;padding:10px 25px 10px 25px;text-align:left;text-decoration:none">Install Client</a>
+												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border:0 solid #777;border-collapse:collapse!important;color:#fefefe;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+													<a href="https://nextcloud.com/install/#install-clients" style="Margin:0;background-color:#fff;border:0 solid #777;color:#6C6C6C!important;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:normal;margin:0;border-radius: 7px;padding:8px;text-align:left;text-decoration:none">Install Client</a>
 												</td>
 											</tr>
 										</table>
diff --git a/tests/data/emails/new-account-email-single-button.html b/tests/data/emails/new-account-email-single-button.html
index 51ed5b16f66..ee5f0582464 100644
--- a/tests/data/emails/new-account-email-single-button.html
+++ b/tests/data/emails/new-account-email-single-button.html
@@ -107,13 +107,13 @@
 				<tr style="padding:0;text-align:left;vertical-align:top">
 					<th style="Margin:0;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;padding:0;text-align:left">
 						<center data-parsed="" style="min-width:490px;width:100%">
-							<table class="button btn default primary float-center" style="Margin:0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;margin:0;max-height:60px;padding:0;text-align:center;vertical-align:top;width:auto;background:#0082c9;color:#fefefe;background-color:#0082c9;">
+							<table class="button btn default primary float-center" style="Margin:0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;margin:0;border-radius:8px;padding:0;text-align:center;vertical-align:top;width:auto;background:#0082c9;color:#fefefe;background-color:#0082c9;">
 								<tr style="padding:0;text-align:left;vertical-align:top">
-									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
 											<tr style="padding:0;text-align:left;vertical-align:top">
-												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border:0 solid #0082c9;border-collapse:collapse!important;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
-													<a href="https://example.org/resetPassword/123" style="Margin:0;border:0 solid #0082c9;border-radius:2px;color:#ffffff;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:1.3;margin:0;padding:10px 25px 10px 25px;text-align:left;outline:1px solid #ffffff;text-decoration:none">Set your password</a>
+												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border:0 solid #0082c9;border-collapse:collapse!important;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+													<a href="https://example.org/resetPassword/123" style="Margin:0;border:0 solid #0082c9;color:#ffffff;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:normal;margin:0;padding:8px;text-align:left;outline:1px solid #ffffff;text-decoration:none">Set your password</a>
 												</td>
 											</tr>
 										</table>
diff --git a/tests/data/emails/new-account-email.html b/tests/data/emails/new-account-email.html
index e45edba74ee..db95a533337 100644
--- a/tests/data/emails/new-account-email.html
+++ b/tests/data/emails/new-account-email.html
@@ -107,26 +107,26 @@
 				<tr style="padding:0;text-align:left;vertical-align:top">
 					<th style="Margin:0;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;line-height:1.3;margin:0;padding:0;text-align:left">
 						<center data-parsed="" style="min-width:490px;width:100%">
-							<table class="button btn default primary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;margin:0 0 30px 0;margin-right:15px;max-height:60px;max-width:300px;padding:0;text-align:center;vertical-align:top;width:auto;background:#0082c9;background-color:#0082c9;color:#fefefe;">
+							<table class="button btn default primary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;margin:0 0 30px 0;margin-right:15px;border-radius:8px;max-width:300px;padding:0;text-align:center;vertical-align:top;width:auto;background:#0082c9;background-color:#0082c9;color:#fefefe;">
 								<tr style="padding:0;text-align:left;vertical-align:top">
-									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
 											<tr style="padding:0;text-align:left;vertical-align:top">
-												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border:0 solid #0082c9;border-collapse:collapse!important;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
-													<a href="https://example.org/resetPassword/123" style="Margin:0;border:0 solid #0082c9;border-radius:2px;color:#ffffff;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:1.3;margin:0;padding:10px 25px 10px 25px;text-align:left;outline:1px solid #ffffff;text-decoration:none">Set your password</a>
+												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border:0 solid #0082c9;border-collapse:collapse!important;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+													<a href="https://example.org/resetPassword/123" style="Margin:0;border:0 solid #0082c9;color:#ffffff;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:normal;margin:0;padding:8px;text-align:left;outline:1px solid #ffffff;text-decoration:none">Set your password</a>
 												</td>
 											</tr>
 										</table>
 									</td>
 								</tr>
 							</table>
-							<table class="button btn default secondary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;margin:0 0 30px 0;max-height:40px;max-width:300px;padding:0;text-align:center;vertical-align:top;width:auto">
+							<table class="button btn default secondary float-center" style="Margin:0 0 30px 0;border-collapse:collapse;border-spacing:0;display:inline-block;float:none;background-color: #ccc;margin:0 0 30px 0;max-height:40px;max-width:300px;padding:1px;border-radius:8px;text-align:center;vertical-align:top;width:auto">
 								<tr style="padding:0;text-align:left;vertical-align:top">
-									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+									<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border-collapse:collapse!important;color:#0a0a0a;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
 											<tr style="padding:0;text-align:left;vertical-align:top">
-												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;background:#777;border:0 solid #777;border-collapse:collapse!important;color:#fefefe;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:1.3;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
-													<a href="https://nextcloud.com/install/#install-clients" style="Margin:0;background-color:#fff;border:0 solid #777;border-radius:2px;color:#6C6C6C!important;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:1.3;margin:0;outline:1px solid #CBCBCB;padding:10px 25px 10px 25px;text-align:left;text-decoration:none">Install Client</a>
+												<td style="-moz-hyphens:auto;-webkit-hyphens:auto;Margin:0;border:0 solid #777;border-collapse:collapse!important;color:#fefefe;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:400;hyphens:auto;line-height:normal;margin:0;padding:0;text-align:left;vertical-align:top;word-wrap:break-word">
+													<a href="https://nextcloud.com/install/#install-clients" style="Margin:0;background-color:#fff;border:0 solid #777;color:#6C6C6C!important;display:inline-block;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen-Sans,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;font-size:16px;font-weight:regular;line-height:normal;margin:0;border-radius: 7px;padding:8px;text-align:left;text-decoration:none">Install Client</a>
 												</td>
 											</tr>
 										</table>