Mail.app problem

  • Hi all,

    we have a bunch of 10.2 Macs and one 10.4 Mac in our infrastructure.
    All are accessing a postfix mailserver running on Solaris.

    One user - the one that is working with the 10.4 machine - now
    discovered something weird. The to header of all his incoming emails in
    Mail.app is no longer <username>@<ourdomain>.de but

    <admin...>

    I checked his emails with Mail.app from the other Macs (10.2). No
    problem, the to name is correct there. I checked his mails with
    thunderbird under Solaris. All fine! But on his 10.4 machine it looks
    like the mails had been addressed to <admin...>. We are accessing
    our mail server via imap. I first thaught of a problem with postfix but
    since everything is fine on other machines it must be something
    specific to his machine or account.

    I am totally clueless! Any idea?

    Thanks a lot!

    Regards,

      Andreas