Set up SPF identify valid email sources for your Microsoft 365 domain …

June 26, 2025

Sender Policy Framework (SPF) is a method of email authentication that helps validate mail sent from your Microsoft 365 organization to prevent spoofed senders that are used in business email compromise (BEC), ransomware, and other phishing attacks.. The primary purpose of SPF is to validate email sources for a domain. Specifically, SPF uses a TXT record in DNS to identify valid sources of …

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