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Exchange Server Errors 7004 and 7010

Posted on 2008-06-15
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Last Modified: 2013-11-30
I began getting these errors about 3 months ago:
1.) This is an SMTP protocol error log for virtual server ID 1, connection #xxx. The remote host "xx.xx.xx.xx", responded to the SMTP command "xexch50" with "504 Need to authenticate first ". The full command sent was "XEXCH50 1836 2 ". This will probably cause the connection to fail.

2.) This is an SMTP protocol log for virtual server ID 1, connection #169. The client at "xx.xx.xx.xx" sent a "xexch50" command, and the SMTP server responded with "504 Need to authenticate first ". The full command sent was "xexch50 2188 2". This will probably cause the connection to fail.

We are NOT losing any mail.

I DO have close to 4000 botnet subnets blocked in SMTP Virtual Server properties (Properties->Access->Connection Control->Connection->All except the list below, but I have had that [growing] list for many months before these events began getting logged. I get about 50-60 of these on weekends and up to 200 on weekdays on mail volume that averages 900 msgs/day with a 47% spam rate.

Does anyone know what I can check for to eliminate these errors?
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Question by:Bluechips
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LVL 13

Expert Comment

by:Richard_de_groot
ID: 21789870
Not to sure about this error but maybe I can try to help:
Have you seen this already?

http://support.microsoft.com/kb/843106

Hope this helps.

Richard.
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Author Comment

by:Bluechips
ID: 21789909
Thanks, I've seen this KB before and stepped through it and all is good, but I am still getting these errors.

I did forget and should have mentioned that I am using GFI Mail Essential sfor SPAM filtering, both before and after these errors began. . . .
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LVL 59

Accepted Solution

by:
Darius Ghassem earned 250 total points
ID: 21789964
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Author Comment

by:Bluechips
ID: 21790766
Well, I've made some cahnges per your recommendation dariusq, but I'll have to give it some time to see if it actually produces the reduction in the logging. I'll post back tomorrow (Jun 16) [GmT-8]. Thanks.
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Author Closing Comment

by:Bluechips
ID: 31467408
Thanks dariusq. While it wasn't exactly as the article described the difference was minor and it WORKED. I'm much obliged.

Bluechips
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