The blocklist prevents Reachkit from sending emails to specific addresses or entire domains. Anything on your blocklist is automatically skipped during campaign sending.

Why Use the Blocklist?

A specific person asked not to be contacted
You want to avoid emailing competitors, partners, or existing customers across their whole company
You need to comply with an opt-out request outside the normal unsubscribe flow
You want to protect certain domains from receiving outreach

How It Works

The blocklist is workspace-wide, so it applies to all campaigns. When a campaign is about to send, it checks the blocklist first. If the recipient matches, the email is skipped.

You can block:

A specific email, like jane@acme.com
A whole domain, like acme.com. This also blocks every subdomain of acme.com, so anyone@mail.acme.com and anyone@sales.acme.com are both skipped.

Unrelated lookalike domains are not affected. Blocking acme.com does not block fakeacme.com.

Adding Entries

Go to Settings > Blocklist to manage your entries. You can add them in two ways:

Manual entry: paste emails or domains, one per line. Reachkit figures out which is which based on whether the line contains @.
Select from leads: search your existing leads and either block that one email or block the entire domain with one click.

Removing Entries

Find the entry in the list and click Remove. The change takes effect immediately and that address (or domain) becomes eligible for campaign sends again.

Blocklist via API

On the Scale plan, you can manage your blocklist programmatically:

GET /api/v1/blocklist lists all entries
GET /api/v1/blocklist/check?email=... returns whether an email would be blocked (including domain matches)
POST /api/v1/blocklist adds entries. Two forms are supported:
- { "value": "acme.com" } for a single email or domain (kind is inferred from the value)
- { "entries": ["jane@acme.com", "acme.com"] } for bulk
DELETE /api/v1/blocklist/:id removes an entry

See the API Documentation article for full details.

Blocklist vs. Unsubscribe

These serve different purposes:

Blocklist is controlled by you. You decide who to block, and unsubscribes do not get added here automatically.
Unsubscribe is initiated by the recipient when they click an unsubscribe link.

Both prevent future emails, but they come from different actions.