What is the best alternative to Deliverability Doctor?

The top-rated alternatives to Deliverability Doctor in the Communication category include Line Bot MCP Server, Palisade, E2a — email for AI agents. These servers offer complementary or alternative capabilities depending on your deployment stack and authentication requirements.

How do Deliverability Doctor alternatives differ in installation and runtime?

Deliverability Doctor 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 Deliverability Doctor 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 Deliverability Doctor 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 Deliverability Doctor

Looking for an alternative to Deliverability Doctor? 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 Deliverability Doctor Specs →

Target Reference Server

Deliverability Doctor Overview

Check if a domain can be email-spoofed: SPF, DMARC, DKIM, MX graded from public DNS. Authless.

Specification Matrix: Deliverability Doctor vs Alternatives

Server Name	Runtime	Auth	Pricing	GitHub Stars	Downloads	Action
D Deliverability Doctor (Target)	Remote (SSE)	Free/None	Free	—	—	Current
Line Bot MCP Server	npx	API key	Free	770	—	Compare →
Palisade	npx	Free/None	Free	—	—	Compare →
E2a — email for AI agents	uvx	Free/None	Free	184	—	Compare →
E2a — email for AI agents	uvx	Free/None	Free	184	—	Compare →
Email Deliverability Audit API	Remote (SSE)	Free/None	Free	—	—	Compare →
M MAILTYPE — Email Domain Capability Intelligence	Remote (SSE)	Free/None	Free	—	—	Compare →
Slack MCP Server	npx	Other	Free	1,792	—	Compare →
D Domainposture MCP	Remote (SSE)	Free/None	Free	—	—	Compare →
M MailX Email Deliverability	Remote (SSE)	Free/None	Free	—	—	Compare →
Threadline MCP	npx	Free/None	Free	77	—	Compare →
Ms 365 MCP Server	npx	Free/None	Free	937	—	Compare →
Emailmd	npx	No auth required	Free	1,303	—	Compare →

Detailed Evaluation of Deliverability Doctor Alternatives

Line Bot MCP Server

Runtime: npx

Verified

MCP server integrating LINE Messaging API to send messages, manage rich menus, and access user profiles.

Key Features:

Push text and flex messages to individual users

Broadcast text and flex messages to all followers

Create, delete, and set default rich menus with multiple action types

3 0 770

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Palisade

Runtime: npx

Monitor and manage email authentication (SPF, DKIM, DMARC, MTA-STS, BIMI) for your domains.

0 0

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E2a — email for AI agents

Runtime: uvx

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

1 0 184

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E2a — email for AI agents

Runtime: uvx

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

1 0 184

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Email Deliverability Audit API

Runtime: Remote (SSE)

Audit email domain deliverability: SPF, DKIM, DMARC, MX. Score 0-100. x402.

0 0

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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.

0 0

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Slack MCP Server

Runtime: npx

MCP server providing Slack workspace data access with message history, threads, DMs, user info, and optional message posting.

Key Features:

Supports Stdio, SSE, and HTTP transports

Operates in OAuth or stealth mode without bot installs

Smart history fetch by date range or message count

1 0 1,792

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Domainposture MCP

Runtime: Remote (SSE)

Remote MCP server: 19 domain-hygiene and email-auth tools (DNS, SPF, DMARC, DKIM, TLS).

0 0

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MailX Email Deliverability

Runtime: Remote (SSE)

Check SPF/DKIM/DMARC/BIMI, blacklists, SMTP/IMAP; DNS lookups; generate email DNS records.

0 0

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Threadline MCP

Runtime: npx

Agent-to-agent messaging relay. Discover agents, send messages, and receive replies. Zero-config.

1 0 77

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Ms 365 MCP Server

Runtime: npx

MCP server providing access to Microsoft 365 services via Graph API with configurable toolsets and authentication.

Key Features:

Authentication using Microsoft Authentication Library (MSAL)

Supports multiple Microsoft cloud environments (Global and China)

Over 300 tools mapping to Microsoft Graph API endpoints

0 0 937

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Emailmd

Runtime: npx

Convert markdown to email-safe HTML with linting and live preview via an MCP server or local CLI.

Key Features:

Markdown to responsive, email-safe HTML conversion

Plain text email version generation

Linting for email deliverability issues

2 0 1,303

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Best Alternatives to Deliverability Doctor

Deliverability Doctor Overview

Specification Matrix: Deliverability Doctor vs Alternatives

Detailed Evaluation of Deliverability Doctor Alternatives

Frequently Asked Questions: Deliverability Doctor Alternatives