* Laura Atkins via mailop <mailop@mailop.org> [2024-03-26 09:21+0000]
On 25 Mar 2024, at 22:58, Gerald Oskoboiny via mailop
<mailop@mailop.org> wrote:
We are planning to move the system that hosts our email
discussion lists from its old home where it has been for
decades to an EC2 instance on AWS. It does about 15k
deliveries per day, most of which go to gmail or google-hosted
email systems.
Don’t use EC2 for mail. Use SES.
Even for something like email discussion lists? 0.00% of this
email is marketing/transactional. It's just a bunch of nerds
talking about web standards.
Is it still necessary to warm up new IP addresses gradually
instead of going directly to this volume of deliveries? My
impression is that it's less and less necessary in the age of
DMARC, SPF and DKIM.
It’s more necessary - you need to warm up both your IP and your
domain AND the combination of IP and domain addresses.
The domain has been around for 30 years so hopefully it's pretty
warm by now. But I'm indeed leery about the new IP.
We recently moved some other email-sending hosts to EC2 instances
and haven't had any real problems with deliverability, but they
have an order of magnitude less volume.
My tentative backup plan if there are issues with the mailing
list host is to reroute its deliveries through one of our other
hosts that have established a bit of a reputation after a few
weeks of deliveries at lower volume.
--
Gerald Oskoboiny <ger...@w3.org>
http://www.w3.org/People/Gerald/
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