Postfix or SASL Port failure ( TLS Support )

Paul Schmehl pauls at
Wed Mar 16 12:55:30 PST 2005

--On Wednesday, March 16, 2005 06:51:13 PM +0100 José Nicolás Castellano 
<jncastellano at> wrote:
> I'm did some installations of postfix with freebsd 5.3 box install.
> Now I want to autenticate with sasl support with pam support. The problem
> is the next:
> In /usr/local/lib/sasl2 i have to add the line:
> mech_list: plain login
> To permit login to pam database, because if i don't add it, the saslauthd
> responses something like:
>  postfix/smtpd[753]: warning: SASL authentication failure: Password
> verification failed
> If i put other authentication protocol FAILS, I use Thunderbird as email
> client.
So what's the problem?

TLS for Postfix means that you are connecting to Postfix over SSL.  Mech 
plain simply means that *within* that secure tunnel, your password is in 
plain text.

That's not a problem unless you know someone has cracked OpenSSl.

Paul Schmehl (pauls at
Adjunct Information Security Officer
The University of Texas at Dallas
AVIEN Founding Member

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