On 2023-06-22 at 19:14:15 UTC-0400 (Thu, 22 Jun 2023 16:14:15 -0700)
Luke via mailop <lukemarti...@gmail.com>
is rumored to have said:


Unfortunately we cant make a rule that retries all 4xx and doesn't retry all 5xx. Despite very smart, well intended people writing RFCs and other
specs that make this feel super clean cut in an acedemic or lab
environment, it's just not how it works in the wild.

And yet somehow it is how the overwhelming majority of mail systems have dealt with SMTP reply codes, for decades, successfully.

SendGrid's deliverability problems are precisely because you and your coworkers think that you are so big that the rules can't apply to you. That you are somehow different and special.

You are wrong. You're nothing special. You're just big. Get over yourselves.



--
Bill Cole
b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Not Currently Available For Hire
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