Email List Hygiene
Email list hygiene keeps audience data and sending permissions current. Handle invalid addresses, opt-outs, complaints, and inactivity according to their different causes.
Email list hygiene is the work of keeping audience records and sending permissions current. It includes handling invalid addresses, honoring opt-outs, and preventing stale imports from restoring a subscription.
Separate failures from inactivity
Stop sending to known invalid addresses and apply complaint suppressions. For temporary failures, inspect the response and follow the provider's retry policy before treating the address as permanently unusable.
An absence of recorded opens does not establish inactivity. Image blocking and privacy features affect tracking. Where available, use relevant product activity, replies, and qualified clicks to decide whether further marketing makes sense. Automated clicks need filtering too.
A validation service can identify some address problems. It cannot establish that the person agreed to receive your marketing, and it cannot guarantee that every accepted address belongs in the audience.
Before the next import
Check where the records came from, what people agreed to receive, and whether the file predates any opt-outs. Preserve the current subscription scope and applicable suppressions. Treat conflicting records as a reason to investigate rather than assuming the imported value is newer.
If you pause marketing to inactive contacts, define the evidence and the way a later subscription request will be handled. Keep the exclusion record required to prevent accidental reactivation, subject to your retention policy.