Am 07.05.2013 14:02, schrieb Vincent Lefevre: > On 2013-05-07 10:54:06 +0200, Reindl Harald wrote: >> it is common practice to not accept mails from hosts without a >> valid PTR > > A PTR is not associated with a host, but with an IP address. That's > important because mail may be sent from different IP addresses
and nay IP address has a A-Record and a PTR period > depending on the recipient or other factors. And it seems that > some users forget to set up a PTR for all their IPv6 addresses. > This apparently includes Debian's mailing-list server. that's their problem >> and you can ignore this but you also need to understand the the >> rules from which machines i and many others accept mail are not up >> to you > > I agree, but I repeat that I cannot change the config of other > users. From what I can see in my mail archive, it is *not* safe > to blindly reject mail from IPs without a valid PTR. At least > currently and because this attitude they are not enforced to fix their setups - if any MTA would reject the mails the problem would not exist since years because even the dumbest admin would realize it if any outgoing message fails
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