<Snip/>
>> However, only the plaintext protocol works correctly (e.g. allows me 
>> to login).
>
> If you are using saslauthd, you can only use plaintext authentication 
> mechanism.
<Snip/>

OBATA, thanks for the information.

What do I need to install to be able to use the other machanisms?  Even though
I'm using TLS/SSL on the line, I really have reservations about sending
usernames and passwords in plaintext.

A little background.  I'm accepting mail for the domain labthug.com and 
have all
mail sent to this domain going to a local unix account.  I want to be able to
authenticate the username and password against the information in /etc/passwd
and friends using the pam subsystem.

Thanks,

Adrian