Email providers signify that non-delivery of your emails using bounces. There are a number of reasons why your email bounces, but this article concerns hard bounces.

<aside> 💡 A hard bounce occurs when an email receiver permanently rejects a message because the email address is invalid or doesn't exist.


Sendloop monitors every hard bounce originating from email campaigns associated with your account. In addition, Sendloop makes note of any spam complaints, as well the opt-out rates, related to your account.

If you hard bounce rate exceeds 0.5%, we will flag your account for activity expressly forbidden by our anti-spam policy.

Ways to Lower Your Hard Bounce Rate

To reduce your hard bounce rate, you can: