Hi Guys
I've been discussing on the [email protected] list about a minor
issue I'm having with SA, and it was noted by a couple people that the headers
of incoming mail indicates qmail is not doing DNS lookups correctly.
Specifically, it seems qmail is not recording the reverse dns of the host from
which it received the mail, and is instead using "Received: from unknown …" for
all incoming messages. DNS works on the command line, if I query using `host`
or `dig` so I don't think it is a problem with our network's DNS. Does qmail
need something special to be able to do dns lookups? This has never been a
problem for us but apparently this is affecting spamassassin's functionality.
Example "received" headers:
Here's one from gmail:
Received: from unknown (HELO mail-pd0-f175.google.com) (209.85.192.175)
by oak.strangecode.com with (AES128-SHA encrypted) SMTP; 19 Oct 2014 05:42:33
-0000
And testing this IP from the command line on our mail server:
{q@oak/0 ~} host 209.85.192.175
175.192.85.209.in-addr.arpa domain name pointer mail-pd0-f175.google.com.
{q@oak/0 ~} host mail-pd0-f175.google.com
mail-pd0-f175.google.com has address 209.85.192.175
Here's one from Rackspace (our host):
Received: from unknown (HELO smtp1-ext.ord1.corp.rackspace.com) (173.203.4.141)
by oak.strangecode.com with (DHE-RSA-AES256-SHA encrypted) SMTP; 20 Oct 2014
17:42:11 -0000
And from the command line:
{q@oak/0 ~} host 173.203.4.141
141.4.203.173.in-addr.arpa domain name pointer
smtp1-ext.ord1.corp.rackspace.com.
{q@oak/0 ~} host smtp1-ext.ord1.corp.rackspace.com
smtp1-ext.ord1.corp.rackspace.com has address 173.203.4.141
Thanks!
Quinn
