Re: What if EHLO/HELO check fails?

Hadmut Danisch wrote:
> 
> Another detail:
> 
> What do we do if the RMX check on the given HELO name
> failed? Do we proceed and see, whether the MAIL FROM
> might succeed or do we declare the whole SMTP session
> as a fake? Or do we not care at all and say: Just determine
> whether HELO and SENDER are ok or not and let the
> MTA admin do with it whatever he wants?

MTA operators will do whatever they want, anyway.

Some will terminate the connection as forged.
Some will assume that the message is more likely to be SPAM
	and do other (content?) checks.
Some will note the failure in a (local) X-Header.
Some will only log the failure.
Some may tarpit the connection.

The possibilities are almost endless.


Raymond S Brand