SPF — Guides | MCSA Guru

Diagram-style cover showing layered Microsoft 365 phishing defenses: anti-phishing policy, Safe Links, MFA, and email authentication records

Build layered phishing defense in Microsoft 365: anti-phishing policies, impersonation protection, Safe Links and Attachments, MFA, DMARC/SPF/DKIM, and user reporting.

MCSA Guru Team Aug 30, 2026 8 min read

Diagram-style cover showing a custom domain connecting to Microsoft 365 through DNS records for verification and mail flow

Microsoft 365 & Exchange

How to Add a Custom Domain to Microsoft 365

Add your own domain to Microsoft 365: verify ownership with a TXT record, set the right MX, CNAME, SPF, and DKIM records, and fix common verification failures.

MCSA Guru Team Jul 2, 2026 8 min read

Diagram-style cover showing a Microsoft 365 mail flow path with checkpoints for service health, message trace, DNS, and quarantine

Microsoft 365 & Exchange

How to Fix Microsoft 365 Email Not Sending or Receiving

Microsoft 365 email not sending or receiving? Work through service health, message trace, MX and SPF, mail flow rules, quarantine, and full mailboxes step by step.

MCSA Guru Team Jun 17, 2026 9 min read

#SPF

How to Protect Microsoft 365 from Phishing Emails

How to Add a Custom Domain to Microsoft 365

How to Fix Microsoft 365 Email Not Sending or Receiving