Definition
Asking a new subscriber to confirm via email before they are added, which improves list quality compared with single opt-in.
Glossary
Double opt-in
Asking a new subscriber to confirm via email before they are added, which improves list quality compared with single opt-in.
Related terms
- List hygieneThe ongoing practice of removing invalid, inactive and risky addresses so your list stays deliverable.
- GDPR for emailEU and UK data rules requiring a lawful basis, often consent, to email people and handle their data, with the right to be removed.
- Email verificationChecking whether an address is valid and safe to send to, by testing syntax, domain and mailbox, to remove dead and risky addresses before sending.
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