Add rel="noopener noreferrer" to links

[MAILPOET-1787]

lib/Mailer/Methods/ErrorMappers/MailPoetMapper.php

@@ -62,6 +62,7 @@ class MailPoetMapper {
             array(
               'class' => 'button button-primary',
               'target' => '_blank',
+              'rel' => 'noopener noreferrer',
             )
           );
           $message .= ' &nbsp; <button class="button js-button-resume-sending">' . __('Resume sending', 'mailpoet') . '</button>';
@@ -71,7 +72,10 @@ class MailPoetMapper {
           $message = Helpers::replaceLinkTags(
             __('You currently are not permitted to send any emails with MailPoet Sending Service, which may have happened due to poor deliverability. Please [link]contact our support team[/link] to resolve the issue.', 'mailpoet'),
             'https://www.mailpoet.com/support/',
-            array('target' => '_blank')
+            array(
+              'target' => '_blank',
+              'rel' => 'noopener noreferrer',
+            )
           );
         }
         break;