On Mon, 22 Oct 2018, Emmanuel Jaep wrote:
You are also right that openrelay.customer.com has a non-working
STARTTLS. They actually have neither authentication nor encryption. This
is actually my current 'challenge': how to set this relay up without
encryption and authentication while keeping our current config for other
relays (encryption + authentication).
If OK, you might also want to change:
smtp_tls_security_level = encrypt
to
smtp_tls_security_level = may
so that TLS is opportunistic rather than enforced.
Cheers,
--
Bernardo.
