On Fri, Nov 21, 2008 at 3:39 AM, mouss <[EMAIL PROTECTED]> wrote: > > if you have no domains in relay_domains, then you don't need > relay_recipient_maps nor reject_unverified_domains. > > you are using a "non standard" setup in the sense that you are declaring > the domains as virtual_alias_domains when they are relay_domains. >
Perhaps "non standard" but it works best for us. 98% of our virtual map is mapped to one of three inbox servers, while the other 2% want to forward their stuff to gmail or some special service. It seems the most flexible way to run a mapping. We only serve one domain as MX on this server. if you have wildcard aliases (alias for the whole domain), then you may > have a backscatter problem. see below. > > > test with a domain for which you have a wildcard alias in one of your > virtual_alias_maps. so if you have a line like > @example.com @example.org > then try sending mail (with telnet or a MUA that uses smtp) to > [EMAIL PROTECTED] > > We have no wildcards. For every recipient there is one mapping entry. I think the Postfix docs should include this method as a valid one for preventing backscatter. So many answers I've read say you require relay_recipient_maps to prevent backscatter generation, while one can get the same prevention with the right virtual mapping set up. Thanks for the confirmation on that. --Donald
