Best-effort email deliverability checks for Node — syntax + disposable, MX record lookup and an optional SMTP RCPT probe (no mail sent). Zero npm dependencies.

Verifox MCP server — verify email deliverability and find business emails (single + bulk) for Claude and any MCP client.

A comprehensive email deliverability testing utility that validates email format, domain existence, DNS records, and tests actual delivery via AWS SES and SMTP

CLI tool to automate Salesforce email deliverability settings

MCP server for the Mamba Labs Domain Deliverability Checker actor on Apify. Audit a domain's email deliverability: SPF, DKIM, DMARC, MX, mail provider, catch-all, blacklist, domain age, and a 0 to 100 health score. Clay-ready output.

Email deliverability audit — SPF, DKIM, DMARC, MX, blacklists, TLS. Letter grades A-F.

CLI and MCP server for EmailGuard — email deliverability, blacklist monitoring, inbox placement testing, and spam analysis

MCP server for Inbox Check — programmatic email deliverability testing across 9 providers (Gmail, Outlook, Yahoo, iCloud, AOL, GMX, T-Online, Mail.ru, Yandex) for AI agents.

SFDX Plugin to set Email Deliverability Access Level for an org via command line. This project uses Puppeteer and headless browsing to open Setup in the target org and set Email Deliverability Access Level to the desired value.

Email deliverability on your own SES account — sending, delivery feedback, suppression and reputation. The layer you would otherwise rent from an ESP.

Email deliverability auditing library. Checks SPF, DKIM, DMARC, MX, blacklists, TLS, and domain age. Zero dependencies — pure Node.js built-ins.

Email deliverability audit — SPF, DKIM, DMARC, BIMI, MTA-STS checks in one command

Modern email validation and DNS deliverability checks for Node.js and Bun, with provider inference and SMTP diagnostics.

Email deliverability diagnostics - SPF, DKIM, DMARC, MX, PTR, blacklist sweep

Verify email deliverability without sending mail. Syntax, MX lookup, SMTP probe, catch-all detection, disposable & role-account flags. Score 0-100 per email.

n8n community node for Bulk Email Verifier & Finder - Mailbox Exists, SPF/DKIM/DMARC — backed by the Apify Actor apivault_labs/email-deliverability-checker. No login. Pay-as-you-go via Apify.

A lightweight and reliable email validator that focuses on validating the format (syntax) of email addresses, ensuring compliance with standard email patterns. Does not verify email deliverability or functionality.

Validates email deliverability via syntax, server checks, and demographic data.

Node.js helper module for MailerSend API

🔍 P3X Network MCP — Model Context Protocol server exposing 17 DNS, SSL, WHOIS, email deliverability, and security tools to any MCP client