Dnia 23.06.2025 o godz. 16:25:16 Slavko via mailop pisze:
> While you are right, that Message-ID is required header,

It is not. RFC 5322 defines Message-ID header as SHOULD, not MUST. 
-- 
Regards,
   Jaroslaw Rafa
   r...@rafa.eu.org
--
"In a million years, when kids go to school, they're gonna know: once there
was a Hushpuppy, and she lived with her daddy in the Bathtub."
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