Email bounce rate in Zoho Campaigns is the percentage of sent emails that were returned undelivered, expressed as (Total Bounces / Total Sent) × 100. It combines hard bounces (permanent failures) and soft bounces (temporary failures). A high bounce rate signals poor list quality or sender reputation issues.
Industry guidance suggests keeping total bounce rate below 2%. Hard bounce rate specifically should stay below 0.5%. Consistent rates above these thresholds indicate the list needs cleaning or that the email acquisition process is capturing invalid addresses.
Use double opt-in for new subscribers to validate email addresses at source. Remove inactive subscribers before they become bounces. Validate imported lists with an email verification service before adding them to Zoho Campaigns. Never import trade show scanned cards without verifying each address.
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