### Installing Postmark CLI Globally (npm)

Source: https://github.com/activecampaign/postmark-cli/blob/main/README.md

This command installs the Postmark CLI tool globally using npm, making it accessible from any directory in the command line. Node.js must be installed as a prerequisite for npm to function.

```bash
$ npm i postmark-cli -g
```

--------------------------------

### Verifying Postmark CLI Installation (Bash)

Source: https://github.com/activecampaign/postmark-cli/blob/main/README.md

This command is used to verify that the Postmark CLI has been successfully installed and is accessible in the system's PATH. Executing `postmark` without any arguments should display the main help output, confirming its readiness for use.

```bash
$ postmark
```

--------------------------------

### Displaying Postmark CLI Help and Commands (Bash)

Source: https://github.com/activecampaign/postmark-cli/blob/main/README.md

This snippet shows the main help output of the Postmark CLI tool, listing available top-level commands like `email`, `servers`, and `templates`, along with global options such as `--version` and `--help`. It serves as a quick reference for users to understand the tool's capabilities.

```bash
$ postmark

  Commands:
    postmark email <command> [options]      Send an email
    postmark servers <command> [options]    Manage your servers
    postmark templates <command> [options]  Pull and push your templates

  Options:
    --version  Show version number
    --help     Show help
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.