On Fri, 17 Oct 2014 07:02:22 -0400 Tanstaafl <tansta...@libertytrek.org> wrote:
> On 10/13/2014 4:21 AM, Joe <j...@jretrading.com> wrote: > > The intention is that the spam emails be accepted by a catch-all > > domain-wide mail server, then later bounced by the one that holds > > the mailboxes and knows the addresses are invalid. > > And that, by definition, is backscatter, which will quickly (and > deservedly so) get you blacklisted if your mail server handles even a > moderate volume of mail, and eventually in any case. I'm well aware of that, over 95% of my rejected spam is deliberately addressed to non-existent users on my domains. None of it gets bounced. > > > If the authoritative mail server for the domain knows the genuine > > recipients, it doesn't work, and that's the biggest single anti-spam > > measure possible. > > No, that is one of many big mistakes that people new to administering > mail servers make. > > Professional mail admins will virtually never, under any > circumstances, accept mail then later bounce it. Possibly I wasn't clear, but I wasn't suggesting that. My point is that a mail server which is accepting mail for a domain needs to know the valid recipient list, and to *reject*, not bounce, mail for non-existent users during the SMTP transaction. Not controversial at all. -- Joe -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/20141017170321.7ca1d...@jresid.jretrading.com
