Hi Noel!
Thank you for your further answer!
(You are right with the demand of sending configs to end guessing, of course!)
Because of your persitently drawing I was encouraged to look for other reasons
than the obvious ones. And I found my mistake, after all. Thank you!
I used to set smtpd_sasl_exeptions_networks to $mynetworks because internal
clients shouldn't been bothered by introducion of optional SMTP Auth at the
SMTP port (25) during first tests some month
ago.
I'd overlooked that it was still active - and prevents $mynetwork clients from
authenticate with SMTP Auth even at all ports, of course.
Regards,
Hasso
