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  • IMAP access and sending mail

    I'm running Exchange 2003 on Server 2003, in an AD domain with about 500 users. From inside the firewall we connect using Outlook and it works perfectly. From the outside, we have been using OWA which is also functioning fine. Recently, the new bosses have asked to be able to access mail on their Blackberries using IMAP.

    All users have IMAP permissions in AD.

    SMTP and IMAP ports in- and out-bound are open on the firewall.

    In the SMTP virtual server properties, I have given the AD group with external users submit and relay permissions.

    The problem now is that external clients connecting by IMAP can get their new mail, but cannot send any mail. When I (or other external users) attempt to send mail using Thunderbird, I get the following error:
    Sending of message failed:
    The message could not sent because connecting to SMTP server servername.com failed.

    This error is typical of what I receive when using a variety of clients. I do not have it using SSL at the moment (until I figure out why this isn't working). Anybody have an idea what I might check next here?

  • #2
    Re: IMAP access and sending mail

    from an external machine can you ping the name of the server you are telling the blackberries to connect to (even if you don't get a response it should resolve)?

    servername.com isn't correct. It should be something like mail.domain.com. You will need a public DNS record to resolve this to your external IP.
    cheers
    Andy

    Please read this before you post:


    Quis custodiet ipsos custodes?

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    • #3
      Re: IMAP access and sending mail

      servername.com was a substitution for my actual server address. But, to answer your questions, no I can't ping it, but that's because ICMP is disabled on the firewall. I know I can get to the server (and that the address resolves) because I can use OWA which is running from it.

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      • #4
        Re: IMAP access and sending mail

        That's fine, we don't know these things so have to ask (I did realise servername.com wasn't correct but would usually expect to see server.domain.com as a substitution for example).

        Can you telnet to port 25 from anywhere you have tested from successfully or does it error?

        Do Thunderbird etc work internally, with and without auth?
        Last edited by AndyJG247; 24th April 2008, 09:25.
        cheers
        Andy

        Please read this before you post:


        Quis custodiet ipsos custodes?

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        • #5
          Re: IMAP access and sending mail

          I concur, test port 25, try to send an email through your server directly using telnet
          ________
          BMW NAZCA C2
          Last edited by DYasny; 6th March 2011, 18:35.
          Real stupidity always beats Artificial Intelligence (c) Terry Pratchett

          BA (BM), RHCE, MCSE, DCSE, Linux+, Network+

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          • #6
            Re: IMAP access and sending mail

            Any reason you aren't using a BES?
            My personal opinion is that any users of Blackberry in a corporate environment without a BES basically having it for posing on the train/golf course. You are using about 5% of the features of the device without a BES.

            Simon.
            --
            Simon Butler
            Exchange MVP

            Blog: http://blog.sembee.co.uk/
            More Exchange Content: http://exchange.sembee.info/
            Exchange Resources List: http://exbpa.com/
            In the UK? Hire me: http://www.sembee.co.uk/

            Sembee is a registered trademark, used here with permission.

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