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POP 3 problem with Exchange 5.5

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4 replies

by zainalb 1 view

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Hi need help here
I have Exchange 5.5 with service pack 3,WInnt 4.0 service pack 4.
All the user want to connet to POP3 will reject by exchange. The errors reported Accept clients on POP3 interface failed in function HrRegisterProtocol with error 0x2740.(event id 11508)

4 replies

by gbworld

The problem you are experiencing is a problem with the port that exchange is listening on for POP3. 0x2740 (hex) is error number 10048 (decimal), which is a winsock "address already in use" error.

This is a known issue with Exchange Server 5.5 and Service Pack 4 for NT 4. The only solution to this problem is to upgrade to Service Pack 5, 6 or 6a.

Note, however, if you are using the Scripting runtime in any early bound COM components, you will have to upgrade the scripting engine after install of the service packs. This is not a problem if you do not use custom or third party DLLs in Internet applicaitons on your network.

Here is the entire error you are getting:
EventID: 11508
Source: MSExchange POP3
Description:
Accept clients on POP3 interface failed in function HrRegisterProtocol with error 0x2741.

This can also cause problems with NNTP (newsgroups/discussion groups) on NT 4.

Gregory A. Beamer
MCP: +I, SE, SD, DBA

by gbworld

By the way, I believe the error has to do with some of the LDAP that Microsoft started migrating into SP4. I have not found any confirmation in MS literature, but the same error can happen on a non-SP4 machine when LDAP is employed with a proxy server and the LDAP port (389) is in use by another service.

Proxy server can also cause a 10048 error when another service grabs port 25. This can be SMTP service (part of IIS 4) or even some TSRs (like virus programs), if they are Internet enabled.
-- Greg

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