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dmarc.quest

SPF sender test

Would mail from this server pass SPF? Enter the IP it connects from and the envelope sender it uses. You get the verdict a strict receiver reaches against the live record, and the term in that record that decides it, through every include on the way.

MAIL FROM is the envelope sender (the Return-Path a receiver records), not the From header: SPF is checked against its domain. Leave it empty to test a bounce, which checks the HELO name instead. Evaluated the way a strict receiver would today (RFC 7208), against the live record. The IP is not stored.