SASL Authentication Failure & Postfix

[Gerard]

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

sasl_passwd
     [smtp.gmail.com]         user:secret
     [smtp.comcast.net]       user:secret
     [smtp.suscom.net]        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:

sasl_passwd
     user1 at gmail.com          user1 at gmail.com:secret
     user2 at gmail.com          user2 at gmail.com:secret
     user3 at comcast.net        user3:secret
     user4 at my.domain.net      user4 at my.domain.net:secret

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


Sep 23 08:30:03 scorpio clamsmtpd: 100A66: accepted connection from: 127.0.0.1

Sep 23 08:30:03 scorpio postfix/smtpd[37138]: connect from
localhost[127.0.0.1]

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 spamcop.net>,
relay=127.0.0.1[127.0.0.1]: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 127.0.0.1[127.0.0.1]: 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.

-- 
Gerard

73% of Americans say that immigration is a serious problem. The other
27% said, 'No habla ingles.'