From: aio shin (aioshingmail.com)
Date: Mon Sep 10 2007 - 20:24:43 CDT

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hi list

I have this undelivered mail bounce message.. I just change the original to
mydomain for posting here.

*Final-Recipient: rfc822;
**giovanni.claveriamail.mydomain.com*<giovanni.claveriamail.mydomain.com>
*Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; unknown user: "giovanni.claveria"*

Now, am not sure, why the user became unknown., the user has entry at
virtual alias map file, say
/etc/postfix/virtual contains below:

*giovanni.claveriamail.mydomain.com* <giovanni.claveriamail.mydomain.com>
*giovanni.claveria *
#this entry will deliver the messages to giovanni locally, on the said host.

The problem happened randomly, because it normally delivers on its mailbox,
there should no problem at all, but at random time, it just happens, some
users becomes unknown for a random time then it goes back to normal again.

Any idea how I should fix this.?

Thanks so much in advance.

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