Wietse Venema:
> Sthu Pous:
> > Thank You for Your time and answer, Patrick:
> >
> > > > and please remove the
> > > > smtpd_banner = The eMail Service
> > > > because it is invalid. The banner must contain the hostname... etc.
> > >
> > > and it must contain "ESMTP" or the client will not know the server can
> > > speak
> > > EXTENDED SMTP, which includes the capability "STARTTLS", which is the
> > > startpoint for TLS ...
> > >
> > I've changed it still no luck, on client's side:
> >
> > [21:35:50] SMTP< 220 The ABC Center ESMTP Service
> > [21:35:50] ESMTP> EHLO localhost
> > [21:35:54] ESMTP< 250-abc.com
> > [21:35:54] ESMTP< 250-PIPELINING
> > [21:35:54] ESMTP< 250-SIZE 30720000
> > [21:35:54] ESMTP< 250-VRFY
> > [21:35:54] ESMTP< 250-ETRN
> > [21:35:54] ESMTP< 250-AUTH PLAIN LOGIN
> > [21:35:54] ESMTP< 250-AUTH=PLAIN LOGIN
> > [21:35:54] ESMTP< 250-ENHANCEDSTATUSCODES
> > [21:35:54] ESMTP< 250-8BITMIME
> > [21:35:54] ESMTP< 250 DSN
> > [21:35:54] ESMTP> STARTTLS
> > [21:35:55] ESMTP< 502 5.5.1 Error: command not implemented
> > ** error occurred on SMTP session
> > *** Error occurred while sending the message:
> > 502 5.5.1 Error: command not implemented
>
> Anti-virus software is known to do these things, because it would
> not be able to decrypt the traffic. The software may be running on
> the client, on the server, or on a firewall.
Never mind. As Reiner observed, the server does not announce STARTTLS
support, so the server needs to configured with
smtpd_tls_security_level=may (or encrypt).
Wietse
