A powerful email validation skill for verifying addresses, bulk processing, and detecting phishing or fraud via the MailCheck API.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install mailcheck-email-verification
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install mailcheck-email-verification using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is MailCheck Email Verification?
The MailCheck Email Verification skill provides developers and AI agents with a robust interface for validating email addresses in real-time. By leveraging the MailCheck API, this tool ensures high deliverability by performing deep syntax, DNS, and SMTP checks. As part of the ecosystem of Openclaw Skills, it helps automate the cleanup of mailing lists and prevents fraudulent signups.
This skill goes beyond basic validation by offering advanced authenticity analysis. It can parse email headers to detect spoofing, phishing, and CEO fraud, providing a comprehensive risk score from 0 to 100. This makes it an essential tool for both marketing automation and cybersecurity workflows within your agentic environment.
MailCheck Email Verification Use Cases
- Validating user signups in real-time to prevent fake account creation and reduce bounce rates.
- Cleaning large email marketing lists via bulk verification to improve sender reputation and deliverability.
- Analyzing email headers for phishing and spoofing attempts to enhance organizational security.
- Automating risk scoring for inbound leads to prioritize high-value communications while filtering out spam.
How MailCheck Email Verification Works
- The skill receives an email address, a list of emails, or raw headers through the CLI or AI agent interface.
- It authenticates with the MailCheck API using a configured API key.
- The tool performs multiple validation layers, including syntax verification, DNS record lookup, and SMTP handshakes to ensure the mailbox exists.
- For authenticity requests, it analyzes headers for lookalike domains and spoofing patterns.
- The skill returns a structured response containing validity status, risk levels, and detailed fraud analysis results.
MailCheck Email Verification Setup
To get started, install the skill via the hub and set your API credentials. Using Openclaw Skills like this allows for immediate integration into your automated workflows.
clawhub install mailcheck-email-verification
You should also set your API key as an environment variable to simplify command execution:
export MAILCHECK_API_KEY="your_sk_live_key"
MailCheck Email Verification Data Schema & Taxonomy
The skill returns structured data helping you categorize the quality of your email lists. Below is the typical schema for verification results:
| Attribute | Description |
|---|---|
email |
The address being verified. |
status |
The verification result (e.g., valid, invalid, disposable). |
risk_score |
A value from 0-100 indicating the risk level. |
risk_level |
Categorized as low, medium, or high. |
fraud_details |
Metadata regarding phishing, spoofing, and domain authenticity. |
MailCheck Email Verification Advanced Features
- Bulk verification capabilities allowing for up to 100 email addresses to be processed in a single request.
- Deep authenticity analysis specifically designed to detect complex CEO fraud and phishing attempts in email headers.
- Trusted domain whitelisting to improve the accuracy of lookalike detection during security audits.
- Seamless integration with existing Openclaw Skills to create multi-agent security and marketing pipelines.
SKILL.md
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