email problem
Toto Gamez
egamez at bonheur.com.ph
Thu Apr 29 02:22:28 UTC 2004
Does this also means that we will received alot of spam mail?
thanks
----- Original Message -----
From: Cowles, Steve
To: 'General Red Hat Linux discussion list'
Sent: Thursday, April 29, 2004 10:01 AM
Subject: RE: email problem
> From: Toto Gamez
> To: redhat-list at redhat.com
> Subject: email problem
>
> Hi
> We're having problem in receiving e-mail, our pque branch is connected
> to the internet via myDSL. They are sending email thru smtp.info.com.ph
> as their smtp and retrieved mail thru our pop3 located in Pasay (postfix)
> but everytime they send email at our domain (@bonheur.com.ph) we cant
> received their mails. When I checked the maillog it says:
>
> Apr 27 16:42:21 pasay postfix/smtpd[31895]: warning: 203.131.180.85:
> hostname adsl-131.180.85.info.com.ph verification failed: Host not found
[snip...]
In short, postfix is reporting that the A record and PTR record for the
connecting IP do not match. Example: Using your log entry above...
[scowles at voyager log]$ host 203.131.180.85
85.180.131.203.in-addr.arpa domain name pointer adsl-131.180.85.info.com.ph.
[scowles at voyager log]$ host adsl-131.180.85.info.com.ph
Host adsl-131.180.85.info.com.ph not found: 3(NXDOMAIN)
I'm not a postfix expert by any means, but I had to configure postfix to be
slightly less restrictive with regards to what postfix considers unknown
clients. I did so by commenting the following in main.cf
# reject_unknown_client
Personally, I don't like commenting the above, but there seems to be a lot
of IP addresses that do not match A/PTR records from legitimate sources.
<groan>
Steve Cowles
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