MisarMailQuick 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.
A permanent email delivery failure due to an invalid, non-existent, or blocked email address.
Unsubscribe RateThe 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.
Master email marketing with MisarMail — AI-powered campaigns, automation, and deliverability tools.
Start Free Trial →