[Mailman-Users] Messages bounce but only for one domain on one list

[Simon White]

09-Feb-04 at 09:25, Tom Caudron (caudron at digitalelite.com) wrote :
> Feb  9 08:33:27 [postfix/smtp] 6C30418B04: to=<username at mydomain.com>, relay=mx00.1and1.com[217.160.230.10], delay=0, status=bounced (host mx00.1and1.com[217.160.230.10] said: 550 rejected: unknown local-part in sender <mylist-bounces at mydomain.com> (in reply to MAIL FROM command))
> 
> Is there some setting I'm missing that overrides the
> local_recipient_maps variable (found in /etc/postfix/main.cf) on a per
> list basis?
> 
> In /etc/postfix/main.cf, I've set:
> 
> local_recipient_maps = 
> 
> Because setting it to nothing is postfix's way of telling itself not to
> try to resolve names locally.  The default setting causes all mail sent
> to external users to fail with the 550 bounce message in
> /var/log/mail/current just as it is now for that one list.

I think you need to look at mydestination and perhaps
recipient_delimiter if indeed it's set to "-" you could be causing
unknown local-part errors too.

local_recipient_maps is just to allow you to reject incoming mail at the
RCPT TO: stage of the SMTP conversation instead of waiting until the end
of the DATA command (thus saving bandwidth on dictionary attack attempts
to spam your users).

Not strictly related to Mailman, file under: Postfix setup with Mailman
using Fetchmail.

-- 
Simon White. Internet Consultant, Linux/Windows Server Administration.
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