Subscribers & import

A subscriber is a single contact in a list: an email address plus any details you store about them. You can add subscribers one at a time, import them in bulk from a file, or collect them through a form — and on paid plans, imported contacts are verified automatically in the background.

Adding contacts

There are three ways contacts enter a list:

Manually — add a single contact with their email and any custom fields.
By import — upload a CSV to add many contacts at once.
Via a form — let people subscribe themselves.

The subscriber table for a list: each row shows email, first and last name, date added, a Subscribed status badge, and a verification column, with status filters and search above — The subscriber table — status badges, verification state, filters, and search across every contact.

Importing from a CSV

Prepare a CSV with an email column and any extra columns you want to keep (first name, company, and so on).
Choose the destination list and upload the file.
Map your columns to the matching fields so data lands in the right place.
Run the import — contacts are added, and on paid plans verification begins automatically in the background.

The CSV import wizard: a four-step sidebar (Upload CSV, Map fields, Settings, Import) with a drag-and-drop upload area and a Download sample CSV link — The import wizard — drop in a CSV, map columns to fields, choose duplicate handling, and run it.

verified

You don't need a separate list-cleaning tool. On paid plans, automatic verification checks imported contacts in the background and flags invalid and high-risk addresses — included in your plan's monthly allowance at no extra charge.

Subscriber status

Contacts carry a status that controls whether they can be emailed — for example, subscribed, unsubscribed, or suppressed after a hard bounce or complaint. Unsubscribed and suppressed contacts are automatically excluded from sends, so you stay compliant without manual effort.

Keeping data useful

The richer your contact data, the sharper your targeting. Store attributes in custom fields and you can build precise segments — by location, plan, interests, or behavior — for more relevant campaigns. Your plan sets how many contacts you can store in total and per list.

Import tips

Use a header row. Clear column names make mapping to fields quick and accurate.
Import only permission-based contacts. Uploading purchased or scraped lists harms deliverability and breaks anti-spam rules.
Keep values consistent. Standardize things like country names so your segments stay reliable.

Frequently asked questions

What happens to duplicate or invalid rows? Duplicates are reconciled to a single contact and malformed addresses are rejected at import on every plan. On paid plans, automatic verification then flags invalid and risky addresses so they're excluded from sends — a messy import still lands clean.

Can I add more details later? Yes. You can update a contact's fields anytime, manually or through an automation.