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

# Cold Email Blocker

> Block cold emails and protect your inbox from spam using AI filters.

## Getting Started

To use the Cold Email Blocker, visit [this link](https://www.getinboxzero.com/cold-email-blocker).

You can run the cold email blocker in three modes:

1. **List here**: This will display the cold emails in the table below.
2. **Auto label**: This will automatically label the cold emails in your inbox with the label `Cold Email`, and display the cold emails in the table below.
3. **Auto archive and label**: This will automatically archive the cold emails in your inbox and label them with the label `Cold Email`, and display the cold emails in the table below.

Cold email processing will only apply to new emails. It will not process emails that have already been processed.

## Custom Prompts

Emails are classified using a prompt. The default prompt works for most people, but you can adjust it by clicking `Edit Prompt`. We recommend giving examples of what you do and don't consider a cold email.

If a sender has emailed you before, they are automatically excluded — the AI won't run on those emails.

## Testing

Click `Test` to open a side panel where you can paste in an email or test against previous emails to see if they would be marked as cold.