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What is a Complaint Rate? - Complaint Rate Definition

Complaint rate is the percentage of recipients who flag your emails as spam. You need to measure your complaint rate on a weekly basis. There are five main reasons for why your complaint rate may be high;

  • Purchased email lists,
  • Not including an unsubscribe link,
  • Irrelevant content,
  • Incorrect email addresses,
  • Email sending frequency.
Return Path: average-complaint-rate-by-sender-score

Complaint Rate Calculation:

Total Number of Complaints/Number of Emails Delivered

You can decrease your complaint rate by following the tips given below;

  • Create a win-back campaign,
  • Regularly remove inactive users from your list,
  • Set expectations in your customers' mind,
  • Maintain consistency,
  • Make it easy to unsubscribe,
  • Use double opt-in.

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