I’ve been seeing some questions about IMAP and POP3 authentication on Exchange Server 2007. So.. Microsoft has released to fix it, here is the link:
http://support.microsoft.com/default.aspx?scid=kb;en-us;937359&sd=rss&spid=10926
Ps.: Log on using other account through POP or IMAP is not supported.
Technorati : Exchange 2007, IMAP4, POP3, cannot connect
Del.icio.us : Exchange 2007, IMAP4, POP3, cannot connect