Kolab not sending External Mails

Stephen Hind s.hind at rwp.co.uk
Thu May 13 11:37:55 CEST 2004

I have used my own internal domain: ADMIN.local!

My test account is called visionary and my fake/internal domain is called

When I try to send a mail to this address I'm using now I get the following
returned undelivered mail message:

<!-- Bounced Mail start -->
This is the Postfix program at host mail.ADMIN.local.

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

<s.hind at rwp.co.uk>: host relay4.tcp.net.uk[] said: 501
    <visionary at ADMIN.local>... Sender domain must exist (in reply to MAIL

Reporting-MTA: dns; mail.ADMIN.local
X-Postfix-Queue-ID: 8651E2D318
X-Postfix-Sender: rfc822; visionary at ADMIN.local
Arrival-Date: Thu, 13 May 2004 09:46:28 +0100 (BST)

Final-Recipient: rfc822; s.hind at rwp.co.uk
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; host relay4.tcp.net.uk[] said: 501
    <visionary at ADMIN.local>... Sender domain must exist (in reply to MAIL
<!-- Bounced Mail end -->

If I try to send to another internet email account I have I don't get any
message bounced back and the mail never gets there, as if the mail got
dropped silently.

Any further ideas?


> -----Original Message-----
> From: Jon Bendtsen [mailto:jon at kollegiegaarden.dk]
> Sent: 13 May 2004 10:17
> To: Stephen Hind
> Cc: Kolab-Users (E-mail)
> Subject: Re: Kolab not sending External Mails
> Den 13. maj 2004, kl. 11:08, skrev Stephen Hind:
> > Excellent the fetchmail works a treat!  Thanks for that!
> >
> > Now for sending:
> > I know postfix is working properly now as I have found the log.  and
> > whenever I send a mail the log says it is sent OK, to quote
> > "status=sent
> > (250 2.1.5 Ok)".
> >
> > I now know why the mails do not reach the internet recipient as the
> > server
> > the mail goes to responds:
> > "Sender domain must exist (in reply to MAIL FROM command)"
> >
> > I presume this happens as I'm not using a FQDN as I don't
> have one.
> > Can I
> > use my public IP address?  When I try to use the public IP
> address as
> > the
> > Mail Domain I can't send any mails at all.  Postfix says I
> have "Bad
> > Syntax"
> > in my client's address settings.
> >
> > Any further ideas would be appreciated, and Many thanks for
> the help
> > so far.
> use example.com as your domain. You can always send with that.
> Beyond that, get your own domain, or make a fake internal one.
> (you can send with any domain you want, just like you can put a fake
> sender address on snailmail)
> JonB

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