Customer email going to /dev/null

trumpetx

Member
Apr 3, 2004
23
0
151
I currently have a customer who reported his email stopped coming in sometime in the past 3 days. I have confirmed this and by checking my exim_mainlog I believe that his mail is being sent to /dev/null.

I have no idea why or how to change this... his settings in cPanel are correct, and I have no idea how this could have been changed. It's possible my prognosis is incorrect. So, here's what I've found.

The failing message:
Code:
2006-10-09 09:26:08 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1GWv8t-0003br-4s
2006-10-09 09:26:09 1GWv8t-0003br-4s => /dev/null <[email protected]> R=central_user_filter T=**bypassed**
2006-10-09 09:26:09 1GWv8t-0003br-4s Completed
2006-10-09 09:26:09 1GWv8r-0003bj-Tp => xxxx <[email protected]> R=sa_localuser T=local_sa_delivery
2006-10-09 09:26:09 1GWv8r-0003bj-Tp Completed
The good message (tested on an address on my account -- same server):
Code:
2006-10-09 09:19:50 1GWv2s-0003Vs-NE <= [email protected] H=(xxxx.xxxxxxxxx.net) [204.89.253.13] P=esmtp S=730 [email protected]
om T="(no subject)"
2006-10-09 09:19:50 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1GWv2s-0003Vs-NE
2006-10-09 09:19:50 1GWv2s-0003Vs-NE => frank <[email protected]> R=virtual_user T=virtual_userdelivery
2006-10-09 09:19:50 1GWv2s-0003Vs-NE Completed
Any ideas what setting needs to be changed? Either from the administrator end or the client end? This is happening with some, not all (confirmed), of my customers.
 

sparek-3

Well-Known Member
Aug 10, 2002
1,983
218
343
cPanel Access Level
Root Administrator
Check to see if the user has any e-mail filters set up. I would bet that they do and one of those filters is being triggered. I don't know if its possible to determine which particular filter is causing this (I've never been able to figure it out), but you can remove all of the filters by doing:

mv /etc/vfilters/domain.com /etc/vfilters/domain.com.old

on the shell.
 

trumpetx

Member
Apr 3, 2004
23
0
151
that worked!


now, why on earth would it work for some customers and not others? is this a setting that they changed?
 

sparek-3

Well-Known Member
Aug 10, 2002
1,983
218
343
cPanel Access Level
Root Administrator
Users have the ability to create e-mail filters in their control panel. Personally, I would not recommend using e-mail filters. Filters work in just the way you have seen. A message that matches a specific filter is removed, the user never knows the message was not receive, the sender never knows the message was not received, it can just create a lot of problems.

Also to keep in mind, by using e-mail filters, if you are filtering the body of a message for a specific term, that term may show up in the uuencoding of an e-mail attachment, meaning that the message would not be received. In my opinion, the better solution is to use SpamAssassin if you are wanting to control your spam as it offers better solutions to this than by just creating e-mail filters.