From: Andreas Winkelmann (mlawinkelmann.de)
Date: Sun Nov 04 2007 - 08:19:36 CST

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On Sonntag, 4. November 2007, Florian Lindner wrote:

> a run a forum which sends confirmation emails with PHP. I recently got
> error replies to this confirmation emails:
>
> <some_emailweb.de>: host mx-ha01.web.de[217.72.192.149] said: 550 Protocol
> violation (in reply to DATA command)
>
> The mail is produced by my mailserver.
> Could this be a misconfiguration of my postfix server?

If you google around for this error you will find a lot of Hits. One of them:

http://www.irbs.net/internet/postfix/0608/0423.html

Hmm, are you sure the e-mail Address at web.de is correct?

--
        Andreas

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