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  1. #1
    Join Date
    Mar 2010

    Default Error using IMAP authentication

    Hello everyone,

    i installed Version : 6.20.0 Rev8 (2011-04-21 12:40:37) on Debian lenny. Everything works fine using database authentication. We now want to use IMAP authentication, so I installed the authetication IMAP package, apt automatically deinstalled authetication database package.
    After restarting groupware/admin daemon nobody was able to login via web and eas.
    I found the following error in the goupware log:

    12.05.2011 10:51:48 com.openexchange.authentication.imap.impl.IMAPAuth entication handleLoginInfo
    INFO: Authentication error on host localhost:143 for user XXXXXX
    javax.mail.MessagingException: Can't load NTLM authenticator;
    How do I install the missing NTLM authenticator?


    Christoph Pfund

  2. #2
    Carsten Hoeger is offline Open-Xchange Professional Services
    Join Date
    Mar 2007


    Configure your imap server to only offer plain authentication (using SSL/TLS).
    If you're using cyrus-sasl, deinstall all authmechs but plain.
    Or specify authmechs you want to use in the corresponding config file.

  3. #3
    Join Date
    Mar 2010


    Hi Carsten,

    thank you for your help.

    I'm using cyrus-sasl, and entering "sasl_mech_list: plain" in /etc/imapd.conf did the trick.

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