[ILUG] Postfix rejecting mails that do not resolve.
gerard.keating at fintrax.com
Wed Oct 6 09:41:05 IST 2004
One reason for this can be using a hosting company that does not provide
an SMTP service, which is not uncommon.
So you might have a user with xxxxx.ie as a domain, and using it for
incoming mail, but using the SMTP servers of which every ISP they use
for the outgoing mail.
I have seen this cause mail to be rejected before.
From: Jason Corcoran [mailto:jason.corcoran at activant.com]
Sent: 06 October 2004 09:17
To: ilug at linux.ie
Subject: [ILUG] Postfix rejecting mails that do not resolve.
Using xname as a DNS I have set up my own postfix and apache web server.
Every now and again I notice this in the postfix log ....
Oct 6 08:01:49 mail postfix/smtpd: warning: 22.214.171.124:
address not listed for hostname wrkst-113-178.woodinternet.net
if I ping this name I get
PING wrkst-113-178.woodinternet.net (126.96.36.199) from 192.168.0.2 :
56(84) bytes of data.
So the ips do not match. The host name and ips vary, I am wondering if
this is a relay attempt or a spammers attempt to mail me. Should I be
configuring postfix to accept these non listed hostnames. A postconf -n
tells me that disable_dns_lookups = yes so I shouldn't be doing DNS
Any pointers ??
Senior Software Engineer,
Activant Solutions Ltd.
Email : Jason.Corcoran at Activant.com
Aim : JasonCorcoran9
Http : http://www.activant.com
Phone : + 353 (0) 43 49202
Irish Linux Users' Group
More information about the ILUG