I've been racking my brains on this one.

We've had someone sending email to a domain we host - and we need to get it to work because the messages are being generated by their web server (domain X) being sent to their every day domain (domain Y)

Here's all we see in our logs:

12:13 08:33 SMTPD(b9c3025a000067de) [192.168.2.88] connect 67.15.172.7 port 48389
12:13 08:33 SMTPD(b9c3025a000067de) [67.15.172.7] EHLO serv01.siteground120.com

That's it.  There is nothing after the EHLO message.

They're sending from an Ensim server setup. They've sent me a snippet from their logs:

2008-12-13 07:13:13 [25534] 1LBUIz-0006dq-B7 <= d...@sender-domain.com H=([192.168.15.100]) [71.190.202.249]:51391 I=[67.15.172.7]:25 P=esmtpa A=fixed_login:dude+sender-domain.com S=755 id=c5691f17.39a26%d...@sender-domain.com T="Test" from for l...@receiver-domain.com 2008-12-13 07:13:13 [25593] cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1LBUIz-0006dq-B7 2008-12-13 07:14:14 [25593] 1LBUIz-0006dq-B7 == l...@receiver-domain.com R=lookuphost T=remote_smtp defer (-1): smtp transport process returned non-zero status 0x000f: terminated by signal 15 2008-12-13 07:19:36 [31472] 1LBUIz-0006dq-B7 Spool file is locked (another process is handling this message) 2008-12-13 07:31:47 [9487] 1LBUIz-0006dq-B7 == l...@receiver-domain.com R=lookuphost T=remote_smtp defer (-1): smtp transport process returned non-zero status 0x000f: terminated by signal 15 2008-12-13 07:32:06 [10535] cwd=/root 12 args: exim -Mc 1LBU3y-0002ZQ-Kf 1LBSP9-0001yN-3c 1LBPD8-0006ao-E9 1LBRZW-0006pa-2m 1LBTWc-0002B3-S6 1LBNZc-000847-7K 1LBHSc-0000Ne-JV 1LBUIz-0006dq-B7 1LBSzz-0002Nr-A2 1LBFuz-000877-Di 2008-12-13 07:34:08 [12552] 1LBUIz-0006dq-B7 Spool file is locked (another process is handling this message) 2008-12-13 07:34:37 [11106] 1LBUIz-0006dq-B7 == l...@receiver-domain.com R=lookuphost T=remote_smtp defer (-1): smtp transport process returned non-zero status 0x000f: terminated by signal 15 2008-12-13 07:36:49 [14165] 1LBUIz-0006dq-B7 == l...@receiver-domain.com R=lookuphost T=remote_smtp defer (-1): smtp transport process returned non-zero status 0x000f: terminated by signal 15 2008-12-13 08:18:54 [17801] 1LBUIz-0006dq-B7 SMTP timeout while connected to mail.cydian.com [69.74.100.88] after EHLO serv01.siteground120.com: Connection timed out 2008-12-13 08:18:55 [17787] 1LBUIz-0006dq-B7 == l...@receiver-domain.com R=lookuphost T=remote_smtp defer (110): Connection timed out: SMTP timeout while connected to mail.cydian.com [69.74.100.88] after EHLO serv01.siteground120.com 2008-12-13 08:18:55 [17787] 1LBUIz-0006dq-B7 ** l...@receiver-domain.com: retry timeout exceeded 2008-12-13 08:18:55 [22385] cwd=/var/spool/exim 7 args: /usr/sbin/exim -t -oem -oi -f < -E1LBUIz-0006dq-B7 2008-12-13 08:18:55 [22385] 1LBVKZ-0005p3-1U <= < R=1LBUIz-0006dq-B7 U=mailnull P=local S=1600 T="Mail delivery failed: returning message to sender" from < for d...@sender-domain.com
2008-12-13 08:18:55 [17787] 1LBUIz-0006dq-B7 Completed QT=1h5m42s

They're claiming that they're making the connection and are timing out waiting for a response from IMail. I don't see anything on our end saying there is any issue here, and I'm wondering if there is a problem on their end listening for the response to the EHLO

they claim it only happens with our server. We don't have this problem with anyone else. its been going on for at least a couple of weeks.

Any suggestions?

Thanks


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