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On 10/19/2010 11:44 PM, ren yufei wrote:
> Dear all,
> I am a newbie in Postfix. I have successfully installed postfix in
> ubuntu refers the tutorials:
Tutorials often fail to explain how it actually works. Don't depend on them.
> now I could send mail internally, but could not send mail to the
> outside (gmail.com, yahoo.com, etc).
> the Mail Delivery Status Report is as follows:
> The mail system
> <email@example.com>: unknown user: "xxx"
"Unknown user" is clear enough.
> [-- Attachment #2: Delivery report --]
> [-- Type: message/delivery-status, Encoding: 7bit, Size: 0.3K --]
> Reporting-MTA: dns; xxx.cewit.stonybrook.edu
> X-Postfix-Queue-ID: BA73BA070A
> X-Postfix-Sender: rfc822; firstname.lastname@example.org
> Arrival-Date: Tue, 19 Oct 2010 14:25:22 -0700 (PDT)
> Final-Recipient: rfc822; email@example.com
> Action: failed
> Status: 5.1.1
> Diagnostic-Code: X-Postfix; unknown user: "xxx"
The logs of that message would provide more insight into what happened.
> It seems the error msg was sent from your local host instead of
> gmail.com <http://gmail.com/>
Is that in the DSN or are these your words ?
> I already tries to "Indirect delivery via the local delivery agent"
> refers to:http://www.postfix.org/MAILDROP_README.html.
How postfix delivers local mail has little or nothing to do with remote
If you can provide logs for such a message, it is fairly simple to
determine what happens.