diff --git a/apps/settings/tests/Mailer/NewUserMailHelperTest.php b/apps/settings/tests/Mailer/NewUserMailHelperTest.php
index 0fe1d922275f4..4b1c7593faf9b 100644
--- a/apps/settings/tests/Mailer/NewUserMailHelperTest.php
+++ b/apps/settings/tests/Mailer/NewUserMailHelperTest.php
@@ -290,7 +290,7 @@ public function testGenerateTemplateWithPasswordResetToken() {
 				<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:200px;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;max-height:60px;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">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
@@ -303,7 +303,7 @@ public function testGenerateTemplateWithPasswordResetToken() {
 									</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:200px;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;margin:0 0 30px 0;max-height:40px;max-width:300px;padding:0;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">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
@@ -522,7 +522,7 @@ public function testGenerateTemplateWithoutPasswordResetToken() {
 				<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:200px;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;max-height:60px;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">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
@@ -535,7 +535,7 @@ public function testGenerateTemplateWithoutPasswordResetToken() {
 									</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:200px;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;margin:0 0 30px 0;max-height:40px;max-width:300px;padding:0;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">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
@@ -743,7 +743,7 @@ public function testGenerateTemplateWithoutUserId() {
 				<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:200px;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;max-height:60px;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">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
@@ -756,7 +756,7 @@ public function testGenerateTemplateWithoutUserId() {
 									</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:200px;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;margin:0 0 30px 0;max-height:40px;max-width:300px;padding:0;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">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
diff --git a/lib/private/Mail/EMailTemplate.php b/lib/private/Mail/EMailTemplate.php
index a83f7787829c5..2c091deb2a15e 100644
--- a/lib/private/Mail/EMailTemplate.php
+++ b/lib/private/Mail/EMailTemplate.php
@@ -234,7 +234,7 @@ class EMailTemplate implements IEMailTemplate {
 				<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:200px;padding:0;text-align:center;vertical-align:top;width:auto;background:%1\$s;background-color:%1\$s;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;max-height:60px;max-width:300px;padding:0;text-align:center;vertical-align:top;width:auto;background:%1\$s;background-color:%1\$s;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">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%%">
@@ -247,7 +247,7 @@ class EMailTemplate implements IEMailTemplate {
 									</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:200px;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;margin:0 0 30px 0;max-height:40px;max-width:300px;padding:0;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">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%%">
diff --git a/tests/data/emails/new-account-email-custom.html b/tests/data/emails/new-account-email-custom.html
index 556cc0acf50c9..e1c9fd4fb4f81 100644
--- a/tests/data/emails/new-account-email-custom.html
+++ b/tests/data/emails/new-account-email-custom.html
@@ -107,7 +107,7 @@ <h1 class="text-center" style="Margin:0;Margin-bottom:10px;color:inherit;font-fa
 				<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:200px;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;max-height:60px;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">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
@@ -120,7 +120,7 @@ <h1 class="text-center" style="Margin:0;Margin-bottom:10px;color:inherit;font-fa
 									</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:200px;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;margin:0 0 30px 0;max-height:40px;max-width:300px;padding:0;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">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
diff --git a/tests/data/emails/new-account-email.html b/tests/data/emails/new-account-email.html
index a60ecbee172b2..e879f44120676 100644
--- a/tests/data/emails/new-account-email.html
+++ b/tests/data/emails/new-account-email.html
@@ -107,7 +107,7 @@ <h1 class="text-center" style="Margin:0;Margin-bottom:10px;color:inherit;font-fa
 				<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:200px;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;max-height:60px;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">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">
@@ -120,7 +120,7 @@ <h1 class="text-center" style="Margin:0;Margin-bottom:10px;color:inherit;font-fa
 									</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:200px;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;margin:0 0 30px 0;max-height:40px;max-width:300px;padding:0;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">
 										<table style="border-collapse:collapse;border-spacing:0;padding:0;text-align:left;vertical-align:top;width:100%">