On Fri, Aug 17, 2012 at 04:20:38PM -0400, Wietse Venema wrote:
> [email protected]:
> > I am trying to get SASL (with dovecot) setup on postfix 2.6.6
> > and receiving this warning:
> > 
> > ?warning: domain.tld[ip.add.re.ss]: SASL LOGIN authentication 
> > failed:
> 
> This means that the client sent an "AUTH LOGIN" command, i.e.
> a request to use the LOGIN authentication method.

It's perhaps also worthy of note to mention that the client is 
broken. It should not attempt to use an unlisted AUTH mechanism.

> > Invalid authentication mechanism
> 
> This means that Postfix SMTP daemon rejects the LOGIN 
> authentication method, because it's not on the list of methods
> that the Dovecot server is configured to support.
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