Email thread

Threading is by signed Reply-To token, never by From:. Quarantined messages failed SPF/DKIM/DMARC — treat with caution.

Outbound

ops@runner.example

Please confirm your booth assignment.

Inbound

vendor@example.com

Confirmed — see you Friday.

InboundUnverified — treat with cautionUnexpected From (forward?)

weird@forward.example

Forwarded reply with failed auth.