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Unsubscribes, bounces and complaints
- Unsubscribe: every email has a link, and Gmail and Yahoo show their own one-click button. It works at once.
- Hard bounce: the address does not exist. The contact is marked bounced at once.
- Soft bounce: a full mailbox, for example. Three in a row count as a hard bounce.
- Complaint: the person marked it as spam. The contact is never emailed again.

An import, a form or the API never subscribes somebody again. Only the person, or you on their request, can.
Next to Unsubscribe, every email also links the person's own email settings page: they can choose which emails they want instead of leaving.
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