mention mailbox in trial-end email

templates/emails/transactional/trial-end.html

@@ -15,6 +15,7 @@
   {{ render_text("- You cannot create new aliases if you exceed the free plan limit, i.e. have more than 5 aliases.") }}
   {{ render_text("- As features like <b>catch-all</b> or <b>directory</b> allow you to create aliases on-the-fly, those aliases cannot be automatically created if you have more than 5 aliases.") }}
   {{ render_text("- You cannot add new domain or directory.") }}
+  {{ render_text("- You cannot add new mailbox.") }}
   {{ render_text("- If you enable PGP Encryption, forwarded emails are not encrypted anymore.") }}
 
   {{ render_text('You can upgrade today to continue using all these Premium features (and much more coming).') }}

templates/emails/transactional/trial-end.txt

@@ -8,6 +8,7 @@ When the trial ends:
 - You cannot create new aliases if you exceed the free plan limit, i.e. have more than 5 aliases.
 - As features like "catch-all" or "directory" allow you to create aliases on-the-fly, those aliases cannot be automatically created if you have more than 5 aliases.
 - You cannot add new domain or directory.
+- You cannot add new mailbox.
 - If you enable PGP Encryption, forwarded emails are not encrypted anymore.
 
 You can upgrade today to continue using all these Premium features (and much more coming).