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Contacts & hygiene

A clean list is a deliverability feature.

Most deliverability problems are list problems wearing a disguise. Five detectors find the addresses that will hurt you, explain why in plain language, and let you act on them in one place.

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Contacts & hygiene

Import, segment, and clean your list.

Contact import and export, segments, custom properties, five list-hygiene detectors, and hosted unsubscribe pages.

Import and export, both ways

CSV in, CSV out, whenever you like. Your list is not hostage to our retention policy or our roadmap — exporting it is a button, not a support request.

  • Properties you define · Attach arbitrary JSON properties to any contact. Phone numbers, plan tiers, signup sources, whatever your segments need to be useful.

Segments that are just lists

Build a segment, add contacts individually or in bulk, mark everyone subscribed, or export it. No query language to learn for something this simple.

  • Hosted unsubscribe pages · Every recipient gets a working unsubscribe link with reason capture. The reasons are worth reading, and honouring them is what keeps your reputation intact.

Five hygiene detectors

Invalid domains, dormant contacts, role addresses, disposable and typo domains, and duplicates after Gmail normalisation — each with a plain explanation of why it matters.

  • Bulk actions on findings · Unsubscribe or delete straight from the detector results. Finding a problem and fixing it should not be two separate products.
What you can inspect

Go and check.

Documentation

  • Why each address was flagged, in a sentence rather than a score.
  • The unsubscribe reasons your recipients actually gave.
  • Every contact's full properties, and which segments they are in.
  • Your entire list, exported to CSV, at any time.
  • Events reference
  • API reference
  • Domains and DNS

Most deliverability problems are list problems wearing a disguise.

A clean list is a deliverability feature.Contacts & hygiene

The rest of the platform

Clean the list before you blame the platform.

Hard bounces to addresses that never existed are the fastest way to damage a sending reputation, and the easiest thing to prevent.

Start sendingOr self-host it

Open core · never venture-backed · operated by Martin Business Consultants