What is Email Suppression List?

Quick Answer

A list of email addresses that should never receive emails — including hard bounces, spam complainers, and unsubscribers.

A suppression list (also called a do-not-email list) ensures you never contact people who have unsubscribed, complained, or bounced. CAN-SPAM requires processing opt-outs within 10 business days; GDPR requires immediate processing. Suppression lists are maintained separately from active contacts and checked before every send. MisarMail automatically maintains a global suppression list updated in real time across all accounts.

Related Terms

Hard Bounce

A permanent email delivery failure due to an invalid, non-existent, or blocked email address.

Unsubscribe Rate

The percentage of recipients who opt out of your mailing list after receiving an email.

Feedback Loop (FBL)

A system where mailbox providers forward spam complaints back to the sending email service.

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