On Mon, 7 Sep 2009 20:49:42 +0100
David Southwell <da...@vizion2000.net> wrote:

> My mailserver uses postfix and has a number of virtual domains. I am
> getting the following difficulties on delivery of legitimate emails
> to remote addresses failing with a request to tun authentication on.
> I am comparatively new to managing mailservers. Could someone please
> tell me what I need to do. My searches on google seem to give me long
> explanations of what is meant to happen but I cannot find simple
> instructions on how to fulfill the requirements!!
> dns1# fgrep abc /var/log/maillog
> Sep  7 17:01:59 dns1 postfix/smtp[86489]: 179BE34D41D: 
> to=<competiti...@bristolphoto.org.uk>, 
> relay=mail.abc.org.uk[xxx.xxx.xxx.xxx]:25, delay=2.2,
> delays=2/0/0.15/0.03, dsn=5.0.0, status=bounced (host
> mail.abc.org.uk[xxx.xxx.xxx.xxx] said: 550 Please turn authentication
> on (in reply to RCPT TO command)) dns1#

You question is probably better suited for the Postfix forum:

In any case, you will need to post the output of:

        postconf -n

Alternately, you can use: postfinger, available at:

You could also try reading the information at:


As well look for a needle in a bottle of hay.

        Miguel de Cervantes
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