I migrated a SBS 2003 server to SBS 2008 over the weekend and have run into an issue with clients not able to connect outlook or mobile phones to the server via pop3 or imap. I seem to be able to authenticate with the server to download mail but not send.
I tried to telnet into server and running a EHLO command but i get: "-ERR Protocol error. 19" as a result. Active sync and RPC are working beautifully by the way...
Does anyone know what this is or what could be causing it?
Thanks in advance.