> 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. > 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. > Nothing else would be changing from the recipient's point of view aside from > the IP address (and network): the domain, return-paths, dkim keys and > selectors involved would all be the same as they have been. > > The new IP address doesn't seem to be on many public RBLs, and I have > contacted Microsoft to have it removed from their block list. Doesn’t matter. It’s a new IP - therefore it starts with a mildly negative reputation. > Do many current sites require an IP's reputation to be established gradually? > (particularly Google) Would it just greylist deliveries for a few hours, or > fail worse than that? > > The new host will be doing deliveries directly, not using SES. That is, IMO, a very poor choice. laura -- The Delivery Expert Laura Atkins Word to the Wise la...@wordtothewise.com Delivery hints and commentary: http://wordtothewise.com/blog
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