On Fri, 2007-05-18 at 12:14 +0400, Alexander Moisseev wrote:

I have Postfix 2.5 with Dovecot 1.0.0 as authentication server. Can I disable SMTP plaintext authentications for WAN clients, but allow it for LAN ones?

It's Postfix that determines if plaintext authentication is disabled, not dovecot-auth. I don't know if you can do this with Postfix.