On Tue, Apr 21, 2009 at 04:09:13PM -0400, Bryan Rawlins wrote: > So my question is, and I'm strictly looking for personal opinions here; > Are callout/callback verifications on the envelope sender when that > sender is signed more acceptable than just doing them in general? I > know SCV in general is a hot topic, I don't wish to rehash it's good/bad > points, just wonder it people whom are generally against it would be > more amiable if it was only done one signed return paths.
Coming from the perspective of an email admin for a medium-sized regional Internet provider, external hosts that do callbacks against our mail servers are immediately blocked. It's essentially an instant-ban for a brief period of time. You asked for personal opinions, so here's mine: There is never a single instance where sender callouts are ever acceptable unless you have prior permission from the remote host. Callouts are quite reasonable, and useful, within your own email network however. -- Dean Brooks [email protected] -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
