Hard Bounce vs. Soft Bounce Emails (and How To Fix Them)

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1. Your sending service’s logs. This is the most direct option. Good logs show the recipient, the status code, and the raw server response for each failed message. They also let you tell a delivered message from an accepted one. “Most platforms report bounce rate per campaign and split hard from soft.” Google Postmaster Tools. This covers Gmail traffic only, but it’s free. It’s also the closest thing to Gmail’s own view of you. Use it to track your spam complaint rate and domain reputation.

   In Bounce-rate monitoring

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