[exim] lookup_plain: server condition with passwd

Hi @all,

i´m looking for the right syntax of the server condition for plain
authenticator.
Until now i authenticated with cram-md5 and user/password in a flat text
file.
The only problem is that outlook xp can´t understand cram-md5. Or does
anyone knows how?
Because of this i have to authenticate against the passwd. But i can´t get
it working.
Where´s my fault?

lookup_plain:
       driver = plaintext
       public_name = PLAIN
       server_condition = ${lookup{$2}passwd{/etc/passwd}{${if
eq{$value}{$3}{yes}{no}}}{no}}
       server_set_id = $2

Thx.


Mirko






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