I am getting the following error from my "currently active" mail server when I send mail from my new Zimbra server. I need to know how to change the FQDN postfix is sending from. Right now it is just sending "zimbra" as you will see in the error, I need it to be "zimbra.t3com.com".

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This is the Postfix program at host zimbra.

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

If you do so, please include this problem report. You can
delete your own text from the attached returned message.







The Postfix program

: host mx.t3com.com[65.115.171.198] said: 504 :
Helo command rejected: need fully-qualified hostname (in reply to RCPT TO
command)

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