A simple, calm diagram shows the flow of an email from sender to recipient. On the left, a "Sender" icon (envelope) sends an email to an "Email Server" (cloud icon). The server performs an SPF check by querying the "DNS Server" (globe icon) for the sender domain's SPF record. If the sending server's IP matches the SPF record, the email is delivered to the "Recipient" (person icon). If not, the email is marked as spam or rejected. Red X icons highlight common failure points: missing SPF record, sender IP not authorized, or DNS lookup failure. Muted blues and grays are used throughout for a calm, clear look.
SPF Troubleshooting

Troubleshooting: SPF Not Passing – Quick Fix

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Get your emails delivered again. A calm, practical guide to fixing SPF failures-fast. What Is SPF and Why Does It