Why list hygiene matters
Mailbox providers judge senders by how recipients respond: mailing thousands who never open drags reputation down for everyone else on the list. A smaller, engaged list outperforms a big dirty one in placement, and therefore in actual reach.
What hygiene routines include
- Validation at signup catching typos and fakes
- Bounce handling: hard bounces removed immediately
- Sunset policies: long-unengaged moved to rare sends or removed
- Re-engagement campaigns as the last call before goodbye
Questions
Isn’t deleting subscribers throwing away money?
The unengaged weren’t money: they were reputation cost wearing a subscriber costume. Suppressing them raises inbox placement for the readers who do buy, which usually nets more revenue from fewer sends.
When is a subscriber “unengaged”?
Relative to your cadence and cycle: no opens or clicks across months of sends, adjusted for how often you mail and how often people buy. Define it, automate the sunset, and stop re-litigating each send.