[Dovecot] Using Dovecot SASL with postfix

[Jonathan Stewart]

I'm trying to use Dovecot SASL with postfix 2.3.3 and when trying to
send mail I get the debug output below.  I don't know enough about whats
going on to know where the problem is but something clearly is not
right.  I would send the configurations for postfix and dovecot except
they are clearly talking to each other so I kinda doubt its a
configuration issue.  The machine can afford to be down for an hour or
two at a time for testing stuff if needed.

Sep  6 12:04:10 server postfix/smtpd[13555]: connect from
mobile-166-137-248-219.mycingular.net[166.137.248.219]
Sep  6 12:04:17 server dovecot: auth(default): client in: AUTH  1
PLAIN   service=smtp
Sep  6 12:04:17 server dovecot: auth(default): client out: CONT 1
Sep  6 12:04:18 server dovecot: auth(default): client in: CONT  1
jonathan
Sep  6 12:04:18 server dovecot: auth(default): plain(?): invalid input
Sep  6 12:04:19 server dovecot: auth(default): client out: FAIL 1
Sep  6 12:04:19 server postfix/smtpd[13555]: warning:
mobile-166-137-248-219.mycingular.net[166.137.248.219]: SASL PLAIN
authentication failed:
Sep  6 12:04:20 server postfix/smtpd[13555]: lost connection after AUTH
from mobile-166-137-248-219.mycingular.net[166.137.248.219]
Sep  6 12:04:20 server postfix/smtpd[13555]: disconnect from
mobile-166-137-248-219.mycingular.net[166.137.248.219]

A working auth looks like this, I'm thinking that IMAP versus SMTP
should not be *too* big a difference in this case.

Sep  6 12:06:22 server dovecot: auth(default): client in: AUTH  1
PLAIN   service=IMAP    secured lip=10.70.3.1   rip=10.70.3.254
Sep  6 12:06:22 server dovecot: auth(default): client out: CONT 1
Sep  6 12:06:22 server dovecot: auth(default): client in: CONT  1
(some kind of hash looking thing)
Sep  6 12:06:22 server dovecot: auth(default): client out: OK   1
user=jonathan
Sep  6 12:06:22 server dovecot: auth(default): master in: REQUEST
1       13554   1
Sep  6 12:06:22 server dovecot: auth(default): master out: USER 1
jonathan        system_user=jonathan    uid=1001        gid=1001
home=/home/jonathan
Sep  6 12:06:22 server dovecot: imap-login: Login: user=<jonathan>,
method=plain, rip=10.70.3.254, lip=10.70.3.1, TLS

Thanks,
Jonathan