Postfix upgraded to version 2.2

We’ve upgraded our mail server, Postfix, to the recently released version 2.2.

We’ve also added a policy daemon to allow much more flexible configuration.

How this affects you:

• email addresses are no longer lowercased on sending (previously
  caused problems for some people)
• the sender address for bounces is now MAILER-DAEMON at
  messagingengine.com rather than just the bareword MAILER-DAEMON
  (which was also a problem for some people)

We are planning to extend the policy daemon to also support different number of recipient limits for different service levels, and also to give better error messages to guests trying to send via SMTP.