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cic 16th November 2007 04:52

Email resides outside of ISPConfig server
We're attempting to use a sendmail script from the website to email a user who's email address is the same of the site ( - However, when we attempt to send email to this user, we get the follownig message:
The Postfix program

<>: unknown user: "joe"
Reporting-MTA: dns;
X-Postfix-Queue-ID: 855A2218092
X-Postfix-Sender: rfc822;
Arrival-Date: Mon, 5 Nov 2007 17:03:55 -0500 (EST)

Final-Recipient: rfc822;
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; unknown user: "joe"

I know this is because Postfix thinks the domain is local to the server but how can I tell postfix that this particular domain's email server resides externally?


falko 16th November 2007 18:53

Please select "External Mailserver" for in ISPConfig (it's on the Options tab if is the main domain of the web site; if it's a Co-Domain, you'll find the correct Options tab under Co-Domains).

cic 16th November 2007 21:58

This was already set...

falko 17th November 2007 20:00

Was it set for or This is a difference...

cic 19th November 2007 04:45

Ummmmmm..... From the admin login, I expand my reseller, expand the site and click on the site. The hostname is www and the domain is Under options, I select External MailServer for MailServer. Is this the correct location?

falko 20th November 2007 15:19

Go to the Co-Domains tab, select, and set it to "External Mailserver" as well (on the Options tab).

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