nextcloud-server/apps/encryption/templates/altmail.php

<?php
/** @var OC_Theme $theme */
/** @var array $_ */

print_unescaped($l->t("Hey there,\n\nthe admin enabled server-side-encryption. Your files were encrypted using the password '%s'.\n\nPlease login to the web interface, go to the section 'ownCloud basic encryption module' of your personal settings and update your encryption password by entering this password into the 'old log-in password' field and your current login-password.\n\n", array($_['password'])));
if ( isset($_['expiration']) ) {
	print_unescaped($l->t("The share will expire on %s.", array($_['expiration'])));
	print_unescaped("\n\n");
}
// TRANSLATORS term at the end of a mail
p($l->t("Cheers!"));
?>

	--
<?php p($theme->getName() . ' - ' . $theme->getSlogan()); ?>
<?php print_unescaped("\n".$theme->getBaseUrl());