I just upgraded from 7.1 to 7.2 and unfortunately it broke my external mail relay (was working perfectly before this). Now when I try to send an email I get the following bounce back:
This is the mail system at host zimbra.*****.org.
I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can
delete your own text from the attached returned message.
The mail system
<******@gmail.com>: host smtp.sasktel.net[22.214.171.124] said: 550 5.7.1
<******@gmail.com>... Relaying denied: You must check for new mail before
sending mail. (in reply to RCPT TO command)
I've tried installing pop-before-smtp but either I don't have it configured right or it's not working.
Any help would be greatly appreciated.
*** UPDATE ***
I copied all the files from /opt/zimbra/postfix-126.96.36.199z to /opt/zimbra/postfix-188.8.131.52z and restarted zimbra and now I'm able to send email again. Not sure what in the new postfix isn't working quite right though.