Need to limit simultaneous pop3 connector connections in SBS 2003

Posted on 2009-05-24
Medium Priority
Last Modified: 2013-11-29
Hi all,

Have an SBS 2003 server utilising pop3 connector to retrieve mail from ISP host and receiving event ID 1023 for any attempts after the 4th simultaneous connection.  Upgrade to new Twin Quad Core server from previous Twin Dual Core server has caused the issue.  It appears that pop3 connector attempts to establish a thread per processor (Core) and the ISP host has a limit of 4 concurrent connections.  Where the previous server attempted and downloaded 4 concurrent email accounts the new server is now attempting to download 8 concurrent email address at the same time with the last four failing.

Is there a method to limit the concurrent (simultaneous) connections from the pop3 connector in SBS 2003 ???

Please do not suggest migrating away from pop3 as this provides a satisfactory contingency for problems.  eg: in the past two months the entire state was without phone or internet access for 14 hours and resulting from this 1 server had no internet access for the better part of a week whilst the phone lines were repaired.
I wont even start on the continual power outages in some cases in excess of 12 hours also.
Question by:Bellzebub
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Accepted Solution

PlusIT earned 2000 total points
ID: 24471217
hi i know there was a registery key in 2003:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SmallBusinessServer\Network\POP3 Connector]

But this is still / core.  I advise you to use a third party POP3 connector to download mail.

Author Comment

ID: 24478822
Thanks for the confirmation.

have looked into this option and was considering testing setting to 0 to determine if it would stop the mail system completely or restrict to non-simultaneous (sequential) downloads, as sequential downloads would also resolve the issue.

Your assistance was greatly appreciated and I will get back as soon as I have had the opportunity to test the outcome of the 0 setting.

Author Closing Comment

ID: 31584892
Thanks for your assistance PlusIT.  Tested the server with a "0" setting and it stopped all mail.  I will need to contact the franchisee mail host to determine if we can have the mail forwarded otherwise I will need to opt for a 3rd party pop3 connector.
Do you have any recommendations that will serve the purpose.

And again thanks for the assistance.

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