deliverability

Spoofy is a program that checks if a list of domains can be spoofed based on SPF and DMARC records.

The largest open-source B2B cold outreach and email warmup service.

Email marketing skill for Claude Code. 55K words, 908 sources, 19 industry playbooks. Install the skill and Claude becomes your email marketing expert.

Obtain an email full profile including reputation, consistency, deliverability, social networks account linked, plus more data points.

A Resend-compatible email platform on Cloudflare Workers — transactional sending, broadcasts, automations, inbound mail and deliverability analytics. MIT, one-click deployable into your own account.

📧 Never end in spam with the world's most comprehensive email deliverability checklist

SocketLabs Email Delivery Python Client Library

Self-hosted email list verifier — syntax, MX, disposable detection, and polite SMTP mailbox probing with catch-all detection. pip install listwash

SocketLabs Email Delivery .NET Client Library

SocketLabs Email Delivery PHP Client Library

Magento2 - Brevo (formerly Sendinblue) Integration Module

SendX's best practices for message performance, email sending deliverability and compliance.

Complete CLI and MCP server for Smartlead — 270+ commands, reverse-engineered internal endpoints, and Claude Code skills. Built by GTM engineers, free for the community.

Open-source transactional email in Rust. Self-host it or use the EU cloud. SMTP and HTTP APIs, DKIM/SPF, inbound routing, webhooks, tracking, and a full dashboard.

SocketLabs Email Delivery Node.js client library

Gmail Postmaster Tools (v2 API) as an MCP server — domains, traffic metrics & sender compliance in Claude, Cursor, and any MCP client. Bring your own Google OAuth. Zero dependencies.

Outlook.com SNDS (Smart Network Data Services) as an MCP server — OAuth sign-in, IP Data & IP Status reports in Claude, Cursor, and any MCP client. Zero dependencies.

Mautic plugin for processing Amazon SNS notifications, including bounce and complaint feedback for improved email deliverability management

SocketLabs Email Delivery Go Client Library https://www.socketlabs.com

Test your Email Deliverability by schedule and receive email reports.