To read more on this issue, visit http://www.faqchest.com/prgm/wuimap-l/imap-02/imap-0204/imap02040213_19518.html

This article explains that because Outlook does not follow the defined IMAP specifications, it causes connection problems. Also, since Microsoft is bad about supporting Outlook, the issue is not likely to be resolved.

A suggestion is to use a standards compliant mail client.

Mozilla Thunderbird is freely available:
http://mozilla.org/products/thunderbird/

Eudora can be purchased:
http://www.eudora.com/