Re: Has rfc2487 been obsoleted and mandatory TLS in smtpd is now kosher?

[Viktor Dukhovni]

On Thu, Jul 29, 2021 at 10:26:09AM +1000, raf wrote:

> The only alternative would be to close port 25, use port 465
> (TLS-only) instead, 

This profoundly confuses the SMTP (relay) protocol with the 
SUBMIT protocol.  MTAs won't EVER send on port 465 or 587.

-- 
    Viktor.