[afnog] Frozen emails

[Chris Wilson]

Hi Ryta,

On Tue, 14 Jan 2014, Ryta Kashemire wrote:

> And when i run less /var/log/exim/main.log, the error message i get is:
> -------------
> 1W1zAt-0005LY-7T ** xxx at xxxxxx.co.ug R=dnslookup T=remote_smtp: SMTP error from remote mail server after RCPT
> TO:<xxx at xxxxxx.co.ug>: host pop.imul.com [41.190.128.29]: 511 Blocked - see http://www.spamcop.net/bl.shtml?41.190.128.53
> 
> I have checked the site and none of the above ips are on their blacklist..

It's possible that the receiving server (pop.imul.com) has its block list 
configured incorrectly, and it's claiming that your mail is blocked when 
in fact it's not.

Am I to assume that the sending and receiving mail server are both under 
your control, since 41.190.128.29 and 41.190.128.53 are in the same Class 
C network?

Because you removed some details from the log message, I cannot tell if 
the sender and recipient address are the same, or they are in the same 
domain. If they are, then Exim will generate a bounce message, but it 
probably won't be able to deliver that message either, because it needs to 
deliver it to the same server (pop.imul.com) which is refusing your mail. 
In this case there's nothing that Exim can do except freeze the message 
for you to inspect later, or throw it away (which will happen anyway to 
messages that remain frozen for a week).

The problem is clearly on the receiving mail server, pop.imul.com. That's 
where you need to continue investigation, not on the sender side.

Cheers, Chris.
-- 
Aptivate | http://www.aptivate.org | Phone: +44 1223 967 838
Citylife House, Sturton Street, Cambridge, CB1 2QF, UK

Aptivate is a not-for-profit company registered in England and Wales
with company number 04980791.