[Python-Dev] Merry Christmas to me, and Python users everywhere

[Barry Warsaw]

On Dec 27, 2016, at 01:34 PM, Glenn Linderman wrote:

>Thanks for this extra information, Ethan. That points at Gmail pretty
>conclusively as the source of the reduction in number of messages. Since it
>has long been known that Gmail suppresses CC or BCC to self, it is likely
>that suppressing duplicate messages from cross-posted mailing lists is also
>done... likely achieved due to matching Message-Id values.

https://wiki.list.org/x/4030680

Cheers,
-Barry