Hi,
I am trying to understand the reason why exim has decided to fail sender
verification, so that I can say something to the sys admin at the
sending site. The 2 lines in the exim log file are below, I have difficulty
understanding them because there are so many
different machines mentioned. I have not tried to obscure the sites since that
might destroy the understanding.
2008-09-26 10:40:09 H=mr40-iz.mailpoalim.co.il (mr40.mailpoalim.co.il)
[212.68.154.40] sender verify fail for <[EMAIL PROTECTED]>: response to "MAIL
FROM:<>" from mr51-iz.mailpoalim.co.il [212.68.154.51] was: 501 Empty sender
address is not allowed
2008-09-26 10:40:09 H=mr40-iz.mailpoalim.co.il (mr40.mailpoalim.co.il)
[212.68.154.40] F=<[EMAIL PROTECTED]> rejected RCPT <[EMAIL PROTECTED]>: Sender
verify failed
So, I deduce:
* mr40-iz.mailpoalim.co.il is the verified name of the machine that connecte to
my client's server, it has the IP address 212.68.154.40
* mr40.mailpoalim.co.il is the name that was given in the HELO line
* mr51-iz.mailpoalim.co.il is 212.68.154.51, this is the first listed MX for
bhimail.co.uk
It is not clear to me which machine is saying: ''Empty sender address is not
allowed'' - I think mr51-iz.mailpoalim.co.il
I think that what is happening is that exim is connecting to
mr51-iz.mailpoalim.co.il to see if it will accept mail to [EMAIL PROTECTED]
and as part of it sends:
MAIL FROM:<>
which mr51-iz.mailpoalim.co.il objects to. Which suggests that that machine
will not accept bounces.
So, I can either:
1) tell the sysadmins that look after mr51-iz.mailpoalim.co.il to fix their
machines
2) fix my machine so that in acl_check_rcpt I have:
require verify = sender/[EMAIL PROTECTED]
3) fix my machine as (2) but only for certain domains:
require sender_domains = lsearch;/etc/exim/WontTakeBounces
verify = sender/[EMAIL PROTECTED]
require sender_domains = !lsearch;/etc/exim/WontTakeBounces
verify = sender/[EMAIL PROTECTED]
Which would be better and why ?
--
Alain Williams
Linux/GNU Consultant - Mail systems, Web sites, Networking, Programmer, IT
Lecturer.
+44 (0) 787 668 0256 http://www.phcomp.co.uk/
Parliament Hill Computers Ltd. Registration Information:
http://www.phcomp.co.uk/contact.php
Past chairman of UKUUG: http://www.ukuug.org/
#include <std_disclaimer.h>
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