Re: SPF records and DKIM signatures on ubuntu/postfix/mailman
Mark Foster <[email protected]>
| Newsgroups | gmane.org.user-groups.linux.new-zealand.general |
|---|---|
| Message-ID | <[email protected]> |
On 14/10/11 14:36, David Pando wrote: > On Fri, Oct 14, 2011 at 1:52 PM, Robin Paulson <[email protected]> wrote: >> the warning includes a link to this page, which gives a fairly comprehensive explanation: >> https://mail.google.com/support/bin/answer.py?hl=en-GB&ctx=mail&answer=185812 >> > > I don't think Google and many other domains are picky about SPF > records or DKIM as not many domains implement them properly , although > they are good additions to prevent your emails from hitting the spam > can. > > Having a correct rdns record is quite import though, as most remote > mail servers will discard incoming emails on the spot if you mail > server does not have a proper record.To check yours you can use > http://postmaster.aol.com/cgi-bin/plugh/rdns.pl and enter the server > IP. > ... or simply use dig -x. The key with rDNS is to ensure that you have a matching forward and reverse pair. The rDNS doesn't have to pertain directly to the host you're operating Mailman under. I was going to use the linux.net.nz host as an example, but I can't as it doesn't have rDNS itself. I will point this out to someone. Meanwhile my own machine: blakjak@hawkeye:~$ dig lists.nzoss.org.nz A +short 121.73.240.178 blakjak@hawkeye:~$ dig -x 121.73.240.178 +short 121-73-240-178.broadband.telstraclear.net. blakjak@hawkeye:~$ dig 121-73-240-178.broadband.telstraclear.net A +short 121.73.240.178 blakjak@hawkeye:~$ There's a matching pair, so it's 'cleaner' than a machine that doesn't have it. Mark. _______________________________________________ NZLUG mailing list [email protected] http://www.linux.net.nz/cgi-bin/mailman/listinfo/nzlug