On Mon, 23 May 2022 15:41:20 -0600, Rob Nagler via mailop <mailop@mailop.org>
wrote:

>I'm struggling to get mail through to Comcast on our new-to-us IPs from
>Linode. We are a sending less than a dozen emails and getting throttled:

It's not the quantity so much as the instantaneous rate.  If you have a
per-domain/mx throttle facility, set it to 250/hr or thereabouts.  If your
system does the usual inrush, the apparent delivery rate can be in the
thousands per hour, even if you only sent twelve.

mdr
-- 
         "There are no laws here, only agreements."  
                -- Masahiko

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