when mailer daemon tries to send to postmaster, it should go to
postmasterexchange.versasys.com (according to definition in alias file).
But instead, it attempts to deliver mail to postmasterversa9.versasys.com
which is local. Mail bounced as a result.

I try to do my homework before seeking help. And am perplex now. Please
point me to a right direction. Thank you.

patrick

 <<aliases>> <<main.cf>> <<Undelivered Mail Returned to Sender>>

-----Original Message-----
From: wietseporcupine.org [mailto:wietseporcupine.org]
Sent: Monday, April 02, 2001 2:55 PM
To: Patrick Wong
Cc: 'postfix-userspostfix.org'
Subject: Re: loop back problem

Patrick Wong:
> postmaster postmasterexchange.versasys.com

That's incorrect syntax. The correct syntax in an alias file
requires a : after the left-hand side.

However, the above alias is never used, because your machine does
not recognize postmasterversa9.versasys.com as a local destination.

> <postmasterversa9.versasys.com>: mail for versa9.versasys.com loops back
to
> myself

In order to have the alias expanded, specify

/etc/postfix/main.cf:
    mydestination = $myhostname localhost.$mydomain

        Wietse

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• application/octet-stream attachment: aliases

• application/octet-stream attachment: main.cf

attached mail follows:

This is the Postfix program at host versa9.versasys.com.

I'm sorry to have to inform you that the message returned
below could not be delivered to one or more destinations.

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 message returned below.

                        The Postfix program

<postmasterversa9.versasys.com>: mail for versa9.versasys.com loops back to
    myself

• application/octet-stream attachment: Delivery error report

attached mail follows:

<postmasterversa9.versasys.com>: mail for versa9.versasys.com loops back to
    myself

• application/octet-stream attachment: Delivery error report

• text/rfc822-headers attachment: Undelivered Message Headers

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