Sometimes emails don't seem to resend, or in any case don't arrive.
I've tried this one numerous times, over a period of ~36hr.
https://www.postgresql.org/message-id/0f9b217d-3d05-fb0e-b228-7f57c3720a58%40postgrespro.ru
It's not in my spambox.
| The message Re: COPY FREEZE and setting PD_ALL_VISIBLE/visibility map bits with messageid
0f9b217d-3d05-fb0e-b228-7f57c3720a58@postgrespro.ruhas been scheduled for resending to justin@telsasoft.com.
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Justin