Mailing Lists Overview
A mailing list is a collection of recipients you send mail to. Learn how to create, upload, search, filter, and manage lists.
CSV Upload & Format
Upload a CSV to populate a mailing list. Learn required columns, optional fields, and the step-by-step upload process.
Radius Search — Purchase a Mailing List
Purchase a targeted mailing list using thanks.io's built-in Radius Search. Filter by demographics like renters, absentee owners, new homeowners, and more.
Sourcing Custom Mailing Lists (Datazapp)
When the built-in Radius Search isn't specific enough, use Datazapp to build highly targeted mailing lists and upload them to thanks.io.
Skip Tracing a Mailing List
Use thanks.io's Append Entire List feature to enrich an existing mailing list with phone numbers, email addresses, names, and verified mailing addresses.
Duplicate Prevention
Duplicate Prevention automatically skips repeated sends to the same recipient within a 36-hour window - so recipients don't get the same piece twice.
Suppression Lists
Turn any mailing list into a suppression list to permanently block those addresses from receiving mail across all orders and sub-accounts.
Exporting Lists
Export any mailing list to CSV - including recipient details, address verification status, and optional engagement data.
Add-to-List Webhooks
Add contacts from any CRM that supports outbound webhooks directly to a thanks.io mailing list - no Zapier needed.
Address Collection Landing Pages
Create a simple hosted form to collect mailing addresses directly into a list. Can also be used as a QR code destination in a mail piece.
VisitorView Website Retargeting
Automatically capture website visitors as mailing list contacts using the VisitorView tracking script - no sign-up form required.