Wietse Venema:
> Ed W:
> > On 13/03/2012 23:50, Wietse Venema wrote:
> > > #submission inet n - n - - smtpd
> > > # -o syslog_name=postfix/submission
> > > # -o smtpd_tls_security_level=encrypt
> >
> > I forget the exact details now, but one mail client, I think it might be
> > an Android or iPhone mail client(?) defaults to using the submission
> > service but without encryption. The error messages were confusing and
> > unhelpful to the customer and I just recall it took some time to realise
> > that it was the enforced tls requirement that was the problem
> >
> > I see no reason to *require* encryption on the submission port (RFC
> > aside). I think "may" is a more appropriate default?
>
> That's not a problem for me. I don't use the submission service
> and rely on input from the real world for this.
Meaning, "may", combined with a setting that allows plaintext
passwords only over encrypted connections. Not sure if that makes
trouble shooting easier than when TLS is always required, though.
Wietse
