Letterhead's Recipient Validation
Edit in CMSRecipient Validation is a built-in feature that keeps your subscriber list clean by verifying the validity of new email addresses before they join your audience.
What it does
Section titled “What it does”- Validates new subscribers automatically — addresses added via CSV import, embed form, or your archive page are checked before being added to your audience.
- Runs daily in the background — validation runs every 24 hours and targets only unvalidated emails.
- Improves list health and deliverability — prevents sending to mistyped or fake addresses, protecting your sender reputation and reducing bounce rates.
Invalid emails are marked with a cleaned status.
What it doesn’t do
Section titled “What it doesn’t do”- Custom signup pages are not supported — validation does not apply to addresses submitted through custom-built signup forms.
- No re-validation of existing subscribers — only new or unvalidated entries are checked.
Where it applies
Section titled “Where it applies”| Source | Validated? |
|---|---|
| CSV import | Yes |
| Archive page signups | Yes |
| Embed form | Yes |
| Custom signup pages | Not supported |
How to turn it on
Section titled “How to turn it on”Recipient Validation is a paid premium feature. It can apply across your whole organization (every channel) or be scoped to a specific channel — for example, to test it on one newsletter first. Reach out to your Account Manager to enable it and choose the scope.
Why use it
Section titled “Why use it”- Improve email deliverability
- Protect your sender reputation
- Avoid sending to invalid or fake addresses
- Reduce bounce-related suppressions and delivery issues
Related
Section titled “Related”Still can’t find what you need? Contact support.