David Cottle wrote:
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One last issue I have is each domain has its own static IP address.
Naturally postfix answers on the main gateway address.
My domains all violate RFC821
<http://www.DNSstuff.com/pages/rfc821.htm> 4.3 (and RFC2821
<http://private.dnsstuff.com/tools/rfc.ch?detail=2821> 4.3.1)
|mail.aus-city.com claims to be non-existent host
server.engineering.idb: <br /> 220 *server.engineering.idb* ESMTP
Postfix <br />|
I tackled this using smtpd_banner as my server's hostname is not a
valid 'internet domain name':
smtpd_banner = gateway.aus-city.com ESMTP $mail_name
Your MX record, the A record for the MX, the rDNS for that IP,
and the hostname should all match.
Yours are all over the place.
|mail.aus-city.com claims to be host gateway.aus-city.com [but that
host is at 202.129.79.106 (may be cached), not 203.206.129.129]. <br />|
Being creative is there any way you can do something clever like:
smtpd_banner = $mydomain ESMTP $mail_name
So it would respond that the same address as what the request is?
That would be a really cool trick considering that the SMTP
protocol requires the 220 greeting be sent before it knows who
the mail is for. No, not possible.
I
can't set mail.aus-city.com as then this domain passes, but the other
27 fail. I tried this but it fails:
|mail.aus-city.com claims to be non-existent host engineering.idb: <br
/> 220 *engineering.idb* ESMTP Postfix <br />
|There must be a way to set this up?
Pick *one* IP and *one* hostname to be the MX for *all* your
hosted domains. The MX hostname does *not* need to match the
hosted domain.
Your DNS/rDNS/MX/hostname is inconsistent. Fix the
inconsistencies and all your domains should pass whatever
tests you want to run.
If you want to give each hosted domain the appearance of
having its own mail server with customized hostname matching
the domain name, you will need to run multiple postfix
instances. This is a lot of extra work, and is not necessary
for proper mail operation.
--
Noel Jones
