Tim Harman via Postfix-users:
> > But it hangs up after EHLO-STARTTLS-EHLO. Something it does not like
> > after the (second) EHLO response?
>
> Yes, I've even tried filtering out a few EHLO messages using postfix,
> but still the same behaviour from Microsoft/Outlook/365.
If a "newer" server works, then I guess the problem is due to
differences in the TLS stack. or in the TLS configuration, or
that the cause is some obscure data-dependent problem(*). TLS makes
data larger and more random.
Compared to TLS, there is not much changing in the SMTP protocol.
The same can be said about TLS configuration versus SMTP configuration.
Hardware fails rarely, but it does happen.
(*) Someone roported long ago that they fixed an obscure Postfix
networking problem by plugging the server into a different port.
Wietse
_______________________________________________
Postfix-users mailing list -- postfix-users@postfix.org
To unsubscribe send an email to postfix-users-le...@postfix.org
