Exchange POP/IMAP support with external MIT trust

[Subu Ayyagari]

Hi,

I have Exchange domain having trust relation with MIT kerberos.
User logins are working fine but...

IMAP and POP3 connections from non-domain systems are not working.
Users from these systems are however able to connect to exchange2003 
using OWA and UPN (user at domain).

Question: When ADS domain authenticates using external MIT trust,
          Does POP3 and IMAP access to Exchange2003 work, when a user
          comes in from a non-domain Laptop/wkstn/mobile device
          (eg: netscape browser on desktops or outlook from pocketPcs).
          
Any info/suggestion will be very helpful.

thanks
-subu
email: s.ayyagari at xpedite.com