[exim] Issue about plain authentication mechanism

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Autor: Manuel Molina Cuberos
Datum:  
To: Exim-users
Betreff: [exim] Issue about plain authentication mechanism

Hello all!

I'm having an issue about plain SMTP auth.

Sometimes, I can see in exim's mainlog something like:

2006-05-11 17:35:17 Authentication failed for (onepc) [11.11.11.11]: 435
Unable to authenticate at present: lookup of
"user="mailID=myuser@???, ou=mydomain.com, o=myorganization"
pass=chimera
ldap:///o=myorganization??sub?(mailID=myuser%40mydomain.com)" gave
DEFER: failed to bind the LDAP connection to server 192.168.1.1:0 - LDAP
error 49: Invalid credentials

The query used to authenticate each user is OK, so eventually any user
during the day can send mail authenticating.

The thing that calls my attention is that "%40" instead the @ sign that
appears in the log, because myuser%40mydomain.com is provided by the
email client as the username to validate.

Is it possible that the email client is sending the string in a wrong
charset ?

Any of you had this problem ?
Hints are welcome.

--

    Regards,


        Manuel Molina Cuberos
        ya.com Internet Factory
        91 141 7931