Email Authentication
Email authentication is a set of records that prove your email is really from you, not a faker.
It works through three records called SPF, DKIM, and DMARC. Together they let email providers check that a message truly came from your domain and was not changed on the way.
Without it, even honest email looks suspicious and often gets blocked. Gmail and Yahoo now require it for anyone sending in volume.
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Start freeLast updated: June 25, 2026