Re: discarding mail during smtp session

On Tue, Feb 22, 2005 at 02:06:09PM +0000, Igor Belikov wrote:
>   Is it correct to reject mail (with 550 error) during SMTP?
>

550 means "permanent failure" and indicates the sending machine should not
reattempt.

 
>   Are all MTAs understand 550 error and stop trying to send same
>   letter more and more times?
>

.. are you talking about "well behaved MTAs" or "spam sending MTAs"?

Any well behaved MTA will take 550 as a failure and will try to inform the
sender of the problem.  Any resends by the sender (the person) are outside the
scope of that failure, though.

Dave