Postfix and SMTP authentication headache

[Tony Wasson]

> I have a small email server at home for my home network[1].  It uses
> Postfix for email processing.  It has Squirrelmail on a web server so I
> can do email when I am not home.  It has worked very well until
> yesterday morning.
>
> At some point yesterday Earthlink decided to change something on their
> end.  I did not change anything on my configurations.  Postfix now
> cannot send out because it fails authentication with the Earthlink SMTP
> server.

I think you need to do smtp_ commands not smtpd_ commands. smtpd is
for incoming connections to port 25. You want smtp_ which is for
outgoing connections.