Am 07.10.2013 20:47, schrieb Erwan David: > Le 07/10/2013 20:37, li...@rhsoft.net a écrit : >> Am 07.10.2013 20:30, schrieb Erwan David: >>> Le 07/10/2013 20:24, li...@rhsoft.net a écrit : >>>> Am 07.10.2013 19:42, schrieb Erwan David: >>>>> That's a matter of policy, if you cannot afford to loose legitimate >>>>> email, you may. >>>> show me one legitimate mail server in 2013 without a PTR >>>> >>>> as server-admin you need to RTFM and anybody which is connecting >>>> a mailserver to the internet not having a PTR or coming with >>>> the lousy excuse "my ISP doe snot support" instead switch to >>>> a sane ISP did not RTFM and has to accept that others do not >>>> accept messages from him - the is no "if" and no "but" >>> You may also completely stop accepting email, thus you will have no spam >>> at all. For me it is more important not to loose legitimate email. >>> You may have a different opinion. >>> >>> But it is false to say tjat a mail server without reverse surely is a >>> spammer. >>> >>> Spammers can afford reverse >> it is very likely that it is a spammer or at least not any important mail >> >> if someone has important mail to send he will learn the hard way that >> all the "best practices" are there for a reason - hence he get a >> clear reject message and if someone refuses to fix it's setup which >> is done within seconds -> his problem >> >> for every rejected legit mail from a badly configured server missing a >> PTR you block 1000000 spam mails >> >> i even go so far if someone complains that his messages are rejected >> because a missing PTR i recommend to fire his admin and in doubt the >> PTR has to match the A-record >> > Tat's false. The best you can hope is that one of the A (or AAAA) record > for one of the PTR of the connecting address is the connecting address > You may have several PTR per IP and several address per name
you may that, you may this.... you may have a sane setup with one IP having one A-record and one PTR i did nowhere say i would enforce this, i said "in doubt it has to match" or at least there must be a A-record for your PTR but that's off-topic on-topic is that anybody setting up a MTA without a PTR is clearly missing the qualification to maintaina mail-system and most likely doe snot care about other best practices which makes him dangerous
