While I agree with your points Laura (and generally anything you have to
say), I felt this right here warranted a secondary point worth making
public to the mailing list:
It’s more necessary - you need to warm up both your IP and your
domain AND the combination of IP and domain addresses.
It's very difficult for people to know what warming up really looks
like. If it were a numbered list of absolute and universal rules, they
would have to change a week later. This makes "email warmup" services
extremely attractive to people. But please, DO NOT fall for this trap.
This is purely my opinion, but email warmup services are about to reach
crisis levels. Legitimate domains sharing subject/content trends with
spammers to a degree typically only reached when a sender on the
legitimate domain is compromised, combined with the systematic/automated
effort to manipulate spam filters at email providers, will very likely
have fallout for the people using these services.
They're becoming so trendy that the mere use of the word "warmup" is
starting to sound like an endorsement of these services.
On 2024-03-26 04:21, Laura Atkins via mailop wrote:
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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