On Mon, Aug 29, 2016 at 4:53 PM, Noel Jones <njo...@megan.vbhcs.org> wrote:
> On 8/29/2016 12:17 PM, Jared Brokaw wrote: > > > > > > > I don't want any recipient address checking or validation or > > > > In that case you should not be using Postfix. > > > > > > I meant I do not necessarily need/want recipient validation on the > > relay, just on the final destination for the time being. I don't > > want to have define every single user that will be receiving email > > on both the relay and on the final destination. It is only temporary > > after all. > > > > Postfix is not a proxy; messages are fully received, placed in the > postfix outgoing queue, and then sent to their destination. > It is now, at least for me anyway :) (joking) You folks are so serious... > > If you blindly accept all recipients, your server will be filled > with dead mail -- mail for which no valid recipient exists, and > which cannot be returned to sender because the sender information is > invalid. This will bring performance to a crawl. Or worse, you'll > return mail to the wrong sender and be blacklisted as a backscatter > source. > I'm aware of the consequences. I know the server, the domains, the users, mail and spam volume, etc... well enough to know that will not be a problem. Under the circumstances where it will only be doing that for a very limited period of time during DNS propagation delays, it's a perfectly acceptable use case...again, at least to me it is. > In some cases, postfix may be able to automatically build a list of > valid recipients. This isn't a perfect solution, but it's far > better than nothing. For this to work, the downstream server must > correctly reject unknown recipients. > http://www.postfix.org/ADDRESS_VERIFICATION_README.html > > Postfix must know valid recipients at the gateway, or you really > shouldn't be running a mail server. > I once knew all those docs by heart. I believe I posted my configuration indicating that I'm already doing all of that and have been for years. There are also extenuating circumstances. I'm just moving a few low volume domains, Lighten up!
