What is a Spam Complaint Rate?

Email spam complaint rate measures how often subscribers mark your emails as spam.
Common reasons include:

1. They didn’t subscribe to your list
2. Your email lacks a valid unsubscribe link
3. They’re still receiving emails after unsubscribing
4. They report your email as spam instead of unsubscribing

Understanding why you receive spam complaints is important. Exceeding the recommended average (below 0.1%) can harm your sender reputation.

With Smartlead's Spam Complaint Rate Calculator, you can identify problem areas, protect your sender reputation, and improve your deliverability.

What Does Smartlead’s Spam Complaint Rate Calculator Do?




Time to live (TTL)





Smartlead's Spam Complaint Rate Calculator helps you identify your current spam complaint rate and offers actionable insights to reduce it. By analyzing your campaign data, our tool helps you optimize your email list and improve your overall outreach performance.

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  • CNAME is the DNS record type.

  • com is the value of the record. That means www will resolve to the IP address of the domain abc.com.

  • 3600 is TTL (time to live) is the expiry time of the CNAME record. It's expressed in seconds. Here 3600 means that the records will be updated after each hour.

Frequently Asked Questions

General Questions

What is a Spam Complaint?

Email automation FAQs- Smartlead

A spam complaint is when a subscriber reports your email as spam. Common reasons include not subscribing to your list, lack of a valid unsubscribe link, or continuing to receive emails after attempting to unsubscribe.

What is the Spam Complaint Rate?

Email automation FAQs- Smartlead

Your spam complaint rate is the percentage of your sent emails that are reported as spam. It's a crucial metric to monitor, as high rates can harm your sender reputation and email deliverability.

What is the Average Spam Complaint Rate?

Email automation FAQs- Smartlead

The industry-standard spam complaint rate to aim for is 0.1% or 1 in 1,000 emails sent. Exceeding this rate can significantly damage your sender reputation.

    How do I Reduce My Spam Complaint Rate?

    Email automation FAQs- Smartlead

    Reduce your spam complaint rate by cleaning your email list regularly (use Smartlead’s Email Verification Calculator), including clear unsubscribe links, and using double opt-ins for new subscribers.