[Mailman-Users] Fwd: Warming IP Addresses -- Gradually Increasing Email Volume

[Greg Sims]

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 <alexander at neilson.net.nz
> wrote:

> Hi Craig
>
> >
> >> On Wed, Feb 22, 2017 at 7:23 AM, Keith Seyffarth <weif at weif.net> wrote:
> >>
> >> Greg Sims <greg at 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.
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