Product guides
Suppressions and do-not-mail
How bounces, complaints, and unsubscribes keep risky addresses out of sends.
Why suppressions exist
Mailbox providers punish senders who ignore hard bounces and spam complaints. EonMailer keeps a suppression set so those addresses never receive campaigns or automation emails.
Sources
- Hard bounce / invalid mailbox
- Spam complaint (feedback loop)
- Unsubscribe / list-unsubscribe
- Manual suppress from contact detail
What you should do
- Investigate spikes — bad import? old list?
- Fix root cause before clearing anything.
- Only clear a suppression when you have fresh, explicit permission.
See Bounce handling and Complaint handling.