Letterhead's Recipient Validation

What It Does

• Validates New Subscribers Automatically
  Email addresses added via CSV import, embed form, or your archive page are automatically checked before being added to your audience.

• Runs Daily in the Background
  Validation occurs every 24 hours and targets only unvalidated emails.

• Improves List Health & Deliverability
  Helps prevent sending to mistyped or fake addresses, protecting your sender reputation and reducing bounce rates.

Note: Invalid emails are marked with a “cleaned” status.

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What It Doesn’t Do

• Custom Signup Pages Are Not Supported
  Validation does not apply to email addresses submitted through custom-built signup forms.

• No Re-Validation of Existing Subscribers
  Existing validated subscribers are not re-validated. Only new or unvalidated entries are checked.

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Where to turn it on?

Organization-Level

When enabled at the organization level, Recipient Validation applies to all channels under your account. This is a good option if you want list protection across the board without managing settings individually per channel.

Channel-Level

You also have the flexibility to turn on Recipient Validation for a specific channel only. This is helpful if you want to test the feature on one channel first or only validate emails tied to certain newsletters.

Note: Recipient Validation is a paid premium feature. To enable it, please reach out to your Account Manager for more details.

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Why Use It?

Enabling Recipient Validation helps:

• Improve your email deliverability

• Protect your sender reputation

• Avoid sending to invalid or fake addresses

• Reduce bounce-related suppression and email delivery issues

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Where It Applies

Source	Validated?
CSV Import	✅ Yes
Archive Page Signups	✅ Yes
Embed Form	✅ Yes
Custom Signup Pages	❌ Not supported