What is the best alternative to Domain Security?

The top-rated alternatives to Domain Security in the Communication category include E2a — email for AI agents, MAILTYPE — Email Domain Capability Intelligence, Mail7 Email Validation. These servers offer complementary or alternative capabilities depending on your deployment stack and authentication requirements.

How do Domain Security alternatives differ in installation and runtime?

Domain Security and its alternatives vary by runtime requirement (Node.js/npx, Python/uvx, Docker, or remote HTTP/SSE endpoints). Check the specification comparison table above to verify command requirements before installing.

Are alternatives to Domain Security free and open source?

Most MCP servers listed on AllMCPs are open source tools under MIT or Apache licenses that you can self-host or run locally with Claude Desktop, Cursor, VS Code, or Windsurf.

How do I side-by-side compare Domain Security with a specific alternative?

Click the "Compare side-by-side →" button on any alternative card to see an in-depth comparison matrix covering feature lists, stars, npm downloads, install configurations, and schema specifications.

Communication• MCP Alternatives Guide

Best Alternatives to Domain Security

Looking for an alternative to Domain Security? Whether you need a different runtime environment, custom authentication support, or alternative API integrations in the Communication ecosystem, we have cataloged and compared the top alternative MCP servers below.

Browse all Communication servers →View Domain Security Specs →

Target Reference Server

Domain Security Overview

Audit a domain's email and web security: SPF, DKIM, DMARC, MTA-STS, DNSSEC, TLS, WHOIS. No API keys.

Specification Matrix: Domain Security vs Alternatives

Server Name	Runtime	Auth	Pricing	GitHub Stars	Downloads	Action
D Domain Security (Target)	—	Free/None	Free	—	—	Current
E E2a — email for AI agents	uvx	Free/None	Free	191	—	Compare →
M MAILTYPE — Email Domain Capability Intelligence	Remote (SSE)	Free/None	Free	—	—	Compare →
M Mail7 Email Validation	npx	Free/None	Free	—	—	Compare →
T Telnyx	—	Free/None	Free	198	—	Compare →
L Line Bot MCP Server	npx	API key	Free	783	—	Compare →
E Emailmd	npx	No auth required	Free	1,379	—	Compare →
L Lumail	npx	Free/None	Free	2	—	Compare →
G Google Workspace	npx	Free/None	Free	186	—	Compare →
D Domain Intel MCP	Remote (SSE)	Free/None	Free	1	—	Compare →
E Email Spam Tester	Remote (SSE)	No auth required	Free	—	—	Compare →
T Telegram MCP	npx	API key	Free	348	—	Compare →
A ARBuilder	npx	API key	Freemium	24	—	Compare →

Detailed Evaluation of Domain Security Alternatives

E2a — email for AI agents

Runtime: uvx

Authenticated email gateway for AI agents — per-agent inboxes, HITL approval, SPF/DKIM verified.

1 0 191

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MAILTYPE — Email Domain Capability Intelligence

Runtime: Remote (SSE)

Email-domain intelligence: MX capability, provider, disposable status, SPF, DMARC, and MTA-STS.

1 0

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Mail7 Email Validation

Runtime: npx

Verify email addresses, clean lists, and audit a domain SPF, DKIM, DMARC and MX setup.

1 0

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Telnyx

Runtime not confirmed

Official TypeScript library for the Telnyx API

1 0 198

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Line Bot MCP Server

Runtime: npx

Verified

Connects an AI agent to LINE Messaging API for messaging, user profiles, quotas, followers, and rich-menu management.

Key Features:

Push text and Flex messages

Broadcast messages to followers

Retrieve user profiles and follower IDs

14 0 783

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Emailmd

Runtime: npx

Render, lint, and preview markdown emails through MCP using hosted HTTP or local stdio transport.

Key Features:

Markdown-to-email-safe HTML rendering

Plain-text email output

Deliverability linting

2 0 1,379

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Lumail

Runtime: npx

Official Lumail email marketing MCP for campaigns, subscribers, and workflows.

1 0 2

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Google Workspace

Runtime: npx

Give AI agents access to Gmail, Calendar, Drive, and more — multi-account, manifest-driven

1 0 186

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Domain Intel MCP

Runtime: Remote (SSE)

Domain & company intel for AI agents: RDAP, DNS, email deliverability, tech stack. No API keys.

2 0 1

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Email Spam Tester

Runtime: Remote (SSE)

Verified

Tests delivered email with SPF, DKIM, DMARC, blocklist, spam-engine, and bulk-sender checks.

Key Features:

Disposable test address reservation

Asynchronous report waiting

42 email deliverability checks

5 0

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Telegram MCP

Runtime: npx

Connects AI assistants to Telegram for account data, dialogs, messages, read status, and draft replies.

Key Features:

Retrieve current account information

List dialogs with unread filtering

Fetch messages from a dialog

2 0 348

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ARBuilder

Runtime: npx

AI-powered MCP server generating Stylus smart contracts, cross-chain SDKs, full-stack dApps, and Orbit chain deployment tools for Arbitrum.

Key Features:

RAG-based retrieval over Arbitrum docs and code examples

Stylus contract generation, testing, debugging, and validation

Cross-chain bridge and messaging code generation

2 0 24

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Best Alternatives to Domain Security

Domain Security Overview

Specification Matrix: Domain Security vs Alternatives

Detailed Evaluation of Domain Security Alternatives

Frequently Asked Questions: Domain Security Alternatives