SASL Authentication Failure & Postfix

Gerard gerard at
Sat Sep 23 17:34:25 EDT 2006

Using Postfix, if I have the following sasl_passwd file, everything

     []         user:secret
     []       user:secret
     []        user:secret

However, when I attempt to use Postfix's sender_dependent_relay_maps
feature with a custom sasl_passwd file, an error occurs.

This is the modified sasl_passwd file:

     user1 at          user1 at
     user2 at          user2 at
     user3 at        user3:secret
     user4 at      user4 at

Using this configuration produces this error message in the mail log:

Sep 23 08:30:03 scorpio clamsmtpd: 100A66: accepted connection from:

Sep 23 08:30:03 scorpio postfix/smtpd[37138]: connect from

Sep 23 08:30:03 scorpio postfix/smtp[37137]: warning: SASL
authentication failure: No worthy mechs found Sep 23 08:30:04 scorpio
postfix/smtp[37137]: 359C8BD7A: to=<beerstud at>,
relay=[]:10025, delay=0.84, delays=0.31/0.21/0.31/0,
dsn=4. 7.0, status=deferred (SASL authentication failed; cannot
authenticate to server[]: no mechanism available)

Sep 23 08:30:04 scorpio postfix/smtpd[37138]: disconnect from
localhost[127.0.0. 1]

I am not sure exactly where the problem is. Worse, I do not understand
why it works in one configuration but not the other.


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