SMTP lost connection

[abusaifedden]

For some reason, one of the servers can't connect to my mail server. Whenever a user tries to send email from that server to my server, the message won't go through and I see the following in the logs (var/log/exim/mainlog):

2007-02-13 23:56:06 SMTP connection from (***.ca) [***.***.***.***] lost while reading message data (header)

this problem occurs only with this ***.ca mail server (as far as I know).

In fact, trying dnsreport.com tool on any of my server domains, I am getting the error message

"ERROR: I could not complete a connection to any of your mailservers!

******.com: Timed out [Last data sent: RCPT TO: ]

If this is a timeout problem, note that the DNS report only waits about 40 seconds for responses, so your mail *may* work fine in this case but you will need to use testing tools specifically designed for such situations to be certain.
"


Can someone help/advise?

Thanks.

[SherKhan]

I would also like to get an answer on this topic.

Thanks in advance.

[chirpy]

First thing to do is check whether you have any inline RBL or other checks in your exim ACL section and remove them if you do. If the problem persists, then it could be more difficult to track down since all exim can tell you is that the SMTP connection has been lost, but since it's lost it doesn't know why.

[abusaifedden]

I solved the problem by removing one of the lists that check for spammers. I did that by changing the exim configuration. I don't recall the problamatic one, but I think it starts with orbl or something like that. I need to check more to find out the exact one causing the problem.. Good luck..