On Wed, 2022-03-02 at 17:28 +0000, Simon Arlott via mailop wrote: > On 2 March 2022 17:12:14 GMT, Edgaras | SENDER via mailop > <mailop@mailop.org> wrote: > > > There's literally nothing you can do as a sender to prevent your > > reputation from being trashed. > > No, that's quite clearly not literally true. Stop DKIM signing the > spam email and the problem goes away. >
This. If you're sending mail on behalf of a stranger, perhaps you should only sign it with their domain. It does seem like Google could notice "old" date headers and BCCs and the fact the mail is coming from a dedicated spam factory and maybe treat it a little differently, though.
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