On Fri, 15 Apr 2022, Benny Pedersen wrote:
On 2022-04-15 10:47, Bernardo Reino wrote:
Many e-mails are sent to "BCC" lists, so they have no To: header (or
have one with "undisclosed-recipients").
bcc does not remove or add to
I didn't say that :)
(maybe the "so they have no.." implied some causality?)
Rephrased: There are e-mails sent only to addresses in [B]CC: which might not
have a To: header at all.
So I'd be careful with rejecting/filtering only based on that.
spammers does not know all that details :=)
It is IMHO irrelevant what you think spammers may or may not know.. I would just
advice not to reject/block based on lack of To: header.
Rspamd tags such e-mails with the MISSING_TO flag, to which you can assign
whatever score you wish (default is 2.0 IIRC).
Cheers,
Bernardo
