What is Complaint Rate?

Complaint rate is the percentage of recipients who flagged your email as spam. You need to measure your complaint rate on a weekly basis. There are five main reasons 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 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.