SPF Rules - Email returned stating "Does not pass SPF requirements for domain"

Symptoms

A person is unable to send email to a TOAST.net email account. The person typically has the email returned to them with the following error message:

  • 550 <ip address> does not pass SPF requirements for domain.

Cause

TOAST.net checks all servers delivering email to TOAST.net for SPF rules. These rules are set up by the sender's ISP and tell TOAST.net how to handle email from them. If there is a rule set up saying "do not accept this email unless it comes from a specific mail server," the message will be returned to the sender. More information on what SPF is and how it works is available HERE.

Solution

Have the sender report the error to their ISP or IT department to adjust their outgoing mail server settings or make adjustments to the SPF rules.

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