According to what I've read on the TMDA website, a user who is not on the same network as the server can use TMDA via the tmda-ofmipd, but will end up sending his passwords in the clear.
Not entirely true, though you are faced with a tricky decision. A mail client talking to tmda-ofmipd can use CRAM-MD5 to encrypt the authentication, in a limited set of circumstances:
CRAM-MD5 is not compatible with remote authentication or checkpasswd authentication, only local file authentication, and then only if your password file contains the password in cleartext.
So for using tmda-ofmpid from another network, you really have three choices:
1 - Transmit the password cleartext, but use a nonessential password.
2 - Authenticate using CRAM-MD5, but be aware that the password is cleartext on the server, and so should be a nonessential password.
3 - Set up tunneling. I'm not entirely sure how to do this, maybe someone else can help you set this up.
-- Jim Ramsay
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