Russell Coker wrote:
> help message). But if I send mail from outside the network I get the
> following:
> <[EMAIL PROTECTED]>: mail for server.example.com loops back
> to myself
>
> Now lists.example.com is a CNAME pointing to server.example.com.
>
> So why is mail sent from the local machine with mailx working, while a message
> sent on port 25 with the same content is rejected?
External MTA are rewriting (canonifying) [EMAIL PROTECTED] to [EMAIL PROTECTED]
because of the CNAME pointing to it. So your postfix will never see any
[EMAIL PROTECTED] addresses.
RFC 2181
10.3. MX and NS records
The domain name used as [...] part of
the value of a MX resource record must not be an alias.
So it's best to change the DNS records:
server.example.com IN A w.x.y.z.
lists.example.com IN MX server.example.com.
Henrik
