> ## Documentation Index
> Fetch the complete documentation index at: https://docs.guhan.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Do not contact

> Block email addresses and whole domains so Guhan never messages them, and see what happens to people already in flight.

The **Do-Not-Contact (DNC)** list is your workspace's block list. Anyone who matches an entry is never added to a List, and anyone already in a sequence is stopped.

## What you can block

| Entry | Example | Blocks |
| - | - | - |
| **Email address** | `bo@example.com` | That exact address |
| **Domain** | `acme.com` | Any email address at that domain |

Those are the only two kinds. There's no block for a LinkedIn profile URL or a phone number, so to keep someone out you block their email address or their company's domain.

<Tip>
  Add your own company's domain so Guhan never reaches out to your own team.
</Tip>

## Add entries

<Steps>
  <Step title="Open the list">
    Go to **Settings → Do-Not-Contact list**.
  </Step>

  <Step title="Paste entries">
    Put one email address or domain on each line. Entries are lowercased and trimmed, and adding one that already exists is harmless. Lines that aren't a valid email or domain are rejected and listed so you can fix them.
  </Step>

  <Step title="Add to list">
    Choose **Add to list**. You can search existing entries from the same page.
  </Step>
</Steps>

## Block a company

On the **Companies** page or a company's detail page, choose **Block**. This adds the company's domain to the DNC list and marks the company as blocked, together in one step.

Unblocking a company doesn't remove its domain from the DNC list. Remove the entry on the DNC page if you want it gone.

## What happens when you add an entry

Adding an entry takes effect right away, including on people already in your workspace:

* **Prospects already in sequences** that match are paused and won't receive further messages.
* **Matching prospects in your Lists** are marked as unsubscribed.
* **New prospects** that match are rejected before they are added to a List.

## Removing an entry

Removing an entry doesn't bring anyone back. Prospects who were paused stay paused, and prospects marked as unsubscribed stay that way. To re-engage someone, add them back to a List and enroll them in a Campaign yourself.

## Good to know

* DNC is per workspace. Blocking `acme.com` in one workspace doesn't block it in another.
* You can add up to 500 entries at a time.
* There's no import or export; entries are added by pasting.

## If something's off

* **A blocked person still got a message.** Check that the entry matches the address they were sent to. An entry for a person's work email doesn't cover a different address of theirs.
* **I can't see the DNC page.** The Settings row is shown to admins. See [Roles and permissions](/workspace-settings/roles-and-permissions).

## Related

<CardGroup cols={2}>
  <Card title="Companies" icon="building" href="/audience/companies">
    Block a company from its page.
  </Card>

  <Card title="Handle replies" icon="inbox" href="/inbox/handle-replies">
    What happens when someone asks not to be contacted.
  </Card>
</CardGroup>


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