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What terms did you try when SEARCHING for a solution: POP3, Exchange 2013

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Dear,

I got POP Fetching working just fine when HESK connected to my Exchange 2003 server. But I replaced the exchange 2003 server for an Exchange 2013 server and now it's not working anymore.
When I configure POP3 Fetching and I test the POP3 connection, this is the answer I get;
Connecting to (domain) ...
S +OK The Microsoft Exchange POP3 service is ready.
C USER helpdesk@ec-hosting.nl
S -ERR Command is not valid in this state.

It seems like Exchange 2013 reacts different to POP3 requests than Exchange 2003 does. It seems like 2013 expects a different command first, before the command "USER"

Does anybody know how to solve this?
Thank you very much!
Regards,
Erwin.

Have you tried with "TLS Protocol" setting in HESK both ON and OFF?

If that doesn't help you may want to try some other authentication methods:
http://technet.microsoft.com/en-us/libr ... 41%29.aspx

Or it may even be a command size issue - in Exchange EMC on the Connection tab under Connection Limits try increasing "Maximum command size" value. By default it should be 40, try 128.

Thanks, I solved it.

The TLS setting didn't work, but on the Exchange server I set the pop3 authentication to basic authentication.
The webserver with the helpdesk software on it is the only server/machine that is allowed to connect to this exchange server using pop3, so that's ok by me.

Thanks for your help!