Pop3 authentication - Can only use user@domain.local

Posted on 2009-04-18
Last Modified: 2013-11-29

I have looked for a solution to this problem before posting but can't seem to find anything that answers my question:

I have a SBS 2003 machine running Exchange 2003 and am trying to connect using Outlook/Blackberry via pop3. Everything is working except that the authentication is only being accepted as user@domain.local and not as I would like.

Do I need to add an association somewhere to tell Exchange to allow the .com as well as the .local ?

Many thanks in advance.

Question by:jerryhatt
    LVL 58

    Accepted Solution


    If Authentication in terms of the username is only working using the @domain.local, that is what I would expect. The internal Active Directory domain is domain.local, and all users use that as their UPN suffix (the usually 'invisible' part after their username) by default.

    You can add additional UPN suffixes and set these on each user, so authentication works using and is the same as their email address. This has several disadvantages though, including the fact users would need to login to the domain using their email address rather than just a username, and I wouldn't like to say what adverse effect it will have on the SBS Server.

    In any event, you should be using OWA or RPC/HTTPS for remote connectivity to Exchange, not POP3/IMAP.


    Author Comment

    Thanks tigermatt,

    I generally use rpc/https but Blackberry connecting via OWA has 10-15 minute delay to receive mails so I use POP3.

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