Cant send mail
I have tried sending directly and through relays. Neither are working.
When i try to send via a known working relay i get
"Relaying denied. Proper authentication required. (in reply to RCPT TO command)"
When i try to send via postfix directly it automatically bounces back.
I can send to another account on the system however.
Any idea how to make this work?
The relay that's denying you doesn't like the IP you're sending from - and it's probably doing the right thing.
Can you post the info from /var/log/zimbra.log from postfix regarding the bounces?