Gmail bounced everything the relay sent: three broken auth mechanisms and a silent OpenDKIM
Short answer: Three independent mechanisms were broken at once, and fixing any one of them changed nothing visible. The domain had no v=spf1 record…
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How to Test Your SPF Record for Common Mistakes (Step by Step)
Your SPF record looks correct. You added the include values your email provider told you to add. You saved the record. Emails are still landing in s…