Well, it's not so much that i care. But google seems to, and bounces mails sent from our server (to gmail), like this: (email before the gmail changed)
Reporting-MTA: dns; rubydesign.fi
X-Postfix-Queue-ID: 873C331E05AC
X-Postfix-Sender: rfc822;
[email protected]
Arrival-Date: Wed, 18 Nov...