On 10/13/2014 5:43 AM, Joe wrote: > On Mon, 13 Oct 2014 07:32:40 +0100 > Jonathan Dowland <j...@debian.org> wrote: > >> On Sun, Oct 12, 2014 at 09:05:14PM -0400, Jerry Stuckle wrote: >>> Among other things, legitimate MTAs have MX records. >> >> Not necessarily. In the absence of an MX record an A record is >> perfectly legitimate. >> >> > > And as I've pointed out to Jerry, a lot of businesses outsource their > incoming email to commercial spam-cleaning services, as well as larger > businesses using separate send and receive servers, and some businesses > receiving email direct but sending via a smarthost. In each of these > cases, the MX would not necessarily have any connection with the > mail sending address. My IP address A-PTR record pair have no direct > connection with any of the email domains I use, with any MX, or any HELO > strings I send. > > There's no one size fitting all with email. Heck, some people use > Yahoo... >
Yes, they outsource their anti-spam. But they do NOT outsource the servers themselves. In many cases, they cannot do so for legal reasons; for instance, in the U.S., many publicly traded companies must keep all emails (even spam) for a specific length of time. The same is true of companies with certain Federal Government contracts. And can you identify any legitimate business which has separate email servers? Just because you do it wrong does not mean the rest of the world does. I can think of a number of companies which will silently drop emails from a configuration such as yours (or at least relegate them to the company's spam folder and not deliver them). Jerry -- 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/543bc359.4010...@attglobal.net
