On Tue, 19 Feb 2013 17:07:43 +0100 Mikael Bak <m...@inbox.lv> wrote: > > Ok, that seems to be very nice. AFAIUI it can be implemented on the > > backend server. I'd prefer not to touch the front-end servers. > > That does NOT sound like a good idea. > If you accept the message on the fronend and then reject is on the > backend, then you will generate a bounce message back to the sender. > If the sender's address is forged, then you will generate > backscatter, and could end up on black lists. > > Reject on the frontend servers to avoid this.
If the backend generates a 5xx, the frontend servers will also generate a 5xx. At least, in case a user does not exist. Don't know if this particular mechanism will work the same way. I will have play with it to find out. And I agree with you: no backscatter. R. -- ___________________________________________________________________ It is better to remain silent and be thought a fool, than to speak aloud and remove all doubt. +------------------------------------------------------------------+ | Richard Lucassen, Utrecht | | Public key and email address: | | http://www.lucassen.org/mail-pubkey.html | +------------------------------------------------------------------+
