Thank you Alexander! Yes, DMARC/DKIM has been up and running for years now. You have some good ideas here.
On Wed, Feb 22, 2017 at 8:28 AM, Alexander Neilson <alexan...@neilson.net.nz > wrote: > Hi Craig > > > > >> On Wed, Feb 22, 2017 at 7:23 AM, Keith Seyffarth <w...@weif.net> wrote: > >> > >> Greg Sims <g...@headingup.net> writes: > >> > >>> Thanks for your feedback Carl. Here is some additional information > about > >>> our environment. We have a single server in a commercial data center > >>> (Softlayer). "Communicating" to the ISPs is a challenge. No reply to > >>> email and no way to discuss something like this on the telephone. The > >> only > >>> answer is to construct a strategy that does not raise a "red flag". > > Are you already using DMARC / DKIM to sign all messages? One of the mailop > people from a big mail provider mentioned that if you have this configured > and it has a reputation then provided you retain the same key and the other > details the same the reputation you have will be tracked and follow that > along. > > This obviously requires this configuration to be setup however if you have > some time left before you decommission then you could get this in place to > attract your existing reputation to the key and help (nothing is perfect > but all of this is a numbers game) > > While I haven't seen this talked about specifically on top of the above > (in a belt and suspenders kind of way) keeping the same forward / reverse / > EHLO name for your new server as the old (provided the old has these > configured to your domain) this could provide another signal that this is > the same system doing the same job just moved to a new IP Address. > > Nothing here will be perfect and if you have the time warming up the new > IP (perhaps setting up the new server's MTA possibly needing different name > in this scenario) and asking your existing server to pass off a small > percentage of your email to that machine as an outbound relay and increase > the number until close to all via the new server then complete the > migration. > > I don't have a guide on the above myself as I haven't had to do this. But > from all the advice I have seen on lists about this topic they seem to be > ideas that will aid deliver ability. > ------------------------------------------------------ > Mailman-Users mailing list Mailman-Users@python.org > https://mail.python.org/mailman/listinfo/mailman-users > Mailman FAQ: http://wiki.list.org/x/AgA3 > Security Policy: http://wiki.list.org/x/QIA9 > Searchable Archives: http://www.mail-archive.com/ > mailman-users%40python.org/ > Unsubscribe: https://mail.python.org/mailman/options/mailman-users/ > greg%40headingup.net > ------------------------------------------------------ Mailman-Users mailing list Mailman-Users@python.org https://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy: http://wiki.list.org/x/QIA9 Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: https://mail.python.org/mailman/options/mailman-users/archive%40jab.org