Does SPF alone protect my domain?
Myth: False. SPF alone does not fully protect your domain. SPF verifies that sending IPs are authorized but does not sign message content or prevent sophisticated spoofing that passes SPF checks.
Comprehensive protection requires SPF plus DKIM (content integrity) plus DMARC (policy alignment). Together they create layered defense against spoofing and provide clear policy for handling failures.
SPF is necessary but not sufficient. Implement all three authentication mechanisms for proper domain protection and optimal deliverability signals to mailbox providers.
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