> On Apr 30, 2018, at 9:40 AM, Ken O'Driscoll via mailop <mailop@mailop.org> > wrote: > > Hi Rob, > > On Mon, 2018-04-30 at 09:35 -0600, Rob Nagler wrote: >> Is there a way to "pre-register" IPs in preparation for a data center >> move? There's been some discussion this list, but I didn't get a sense of >> a definitive answer. > > Not really. There's no definitive central source for recording sending > reputation, it's a very dispersed ecosystem and not all of it's publicly > available either. > > [...snip...] >> We have started to go to Google, MS SNDS, etc. Is that the best that we >> can do? > > Also make sure that > 1. when you do the cut-over you warm-up any IPs that are going to be > sending more than a few mails per day, > 2. your list hygiene is exemplary - moving to new IPs can magnify existing > issues, > 3. you remember to update your reverse DNS entries on the new range and > 4. you try and avoid sending from old and new simultaneously on the same > domain as there's a remote possibility you'll get incorrectly flagged as > a "snowshoe" spammer - i.e. one who tries to spread their reputation > over multiple ranges.
(4) is probably unavoidable while ramping up traffic on the new pool, and I doubt it'd be a problem. Also that you're sending DKIM signed mail for long enough to matter from the old IP addresses and you take the same signatures (even, *ew*, the same selectors) to the new ones. It might even be worth doing a bit of DMARC p=none to make sure your authentication is as universal as you think. > We could go to a reputation service, but this seems overkill as we aren't > an ESB, just ordinary (small) email lists and aliases with a few monthly > mass mailing (<10K lists). With that little traffic it's possible that you're not big enough to have much of a reputation most places, so it may not be much of an actual issue. Cheers, Steve _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
