Exchange 2003 & Incoming Mail now not working

Exchange 2003 & Incoming Mail now not working

Well we upgraded our mail server to 2003 finally from 2000 and now it no longer can connect to the mailbox.

I know you say it isn't supported but the fact remains that it has been working.

Also the system log doesn't have any errors which is strange, I started the service to see if it would produce an error but I only get it when i try to save the details.

FAILURE :Email Settings saved successfully. But error occured while trying to check connection with mail server - Problem connecting to mailbox.


Any help would be appreciated thanks.

PS
Outgoing is working fine










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