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20 Best Email MCP Servers: compared and ranked, September 2026Ranked from 2,467 matching servers on stars, growth, downloads and maintenance. Updated .

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    Enables real-time email verification via MCP tools, checking syntax, MX, disposable domains, and optional SMTP probe to determine deliverability with a VALID/RISKY/INVALID verdict.
    2
    5 npm
    MIT
  • A
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    Giggal.ai is an email verification tool that runs a deep mailbox existence check on every address and verifies catch-all/accept-all and even SEG protected emails. Your bounce rate stays under 5%, and the 30% of every B2B list that other tools flag as "Risky" becomes deliverable again.
    3
    MIT
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    quality
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    Enables agents to evaluate whether a product-adoption message is worth sending by applying a fixed, evidence-based rubric to a draft, recipient context, evidence, and the agent's own assessment, returning a send, revise, or hold recommendation with a score and reasons.
    2
    MIT
  • A
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    Agent-native cold-email infrastructure providing ~12 high-level tools for domain setup, mailbox provisioning, campaign launch, inbox management, and metrics, all operated via MCP or CLI.
    28
    1
    MIT
  • A
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    A website audit MCP server that provides free tools to check on-page SEO elements like titles, descriptions, and images across up to 20 pages, and also validates robots.txt, sitemap.xml, and llms.txt accessibility.
    2
    MIT
  • A
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    quality
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    Enables sending emails via SMTP with template management, supporting multiple SMTP configurations, template creation with variable substitution, and bulk email sending with rate limiting.
    6
    150 npm
    21
    MIT
  • A
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    A Model Context Protocol server for Plunk, the open-source self-hosted email platform. Provides 84 tools for transactional email, contacts, campaigns, segments, templates, workflows, events, and analytics through the Plunk API.
    11
    9 npm
    2
    MIT
  • A
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    Programmatic email deliverability testing for AI agents. Create inbox placement tests across Gmail, Outlook, Yahoo, Mail.ru, Yandex — get per-provider placement (Inbox/Spam/Promotions), SPF/DKIM/DMARC auth, Rspamd & SpamAssassin verdicts, DNS health (MX, PTR, DNSBL), and live SSE results.
    5
    34 npm
    2
    MIT
  • A
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    Enables AI and LLM systems to interact with the Buttondown newsletter service, supporting email drafting, scheduling, analytics retrieval, and list management through a Model Context Protocol interface.
    4
    1
    MIT
  • A
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    Enables sending transactional emails through GetMailer from AI assistants. Supports email operations, template management, domain verification, analytics, suppression lists, and batch email jobs.
    14
    6 npm
    MIT
  • A
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    quality
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    Enables interaction with the XEM Email API to send emails, manage campaigns, and organize contact lists. It supports features like HTML content, scheduling, template management, and bulk contact imports from CSV files.
    7
    11 npm
    MIT
  • A
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    B
    quality
    A
    maintenance
    Enables comprehensive email marketing and transactional email operations through SendGrid's API v3. Supports contact management, campaign creation, email automation, list management, and email sending with built-in read-only safety mode.
    58
    221 npm
    3
    ISC
  • A
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    quality
    F
    maintenance
    Provides an interface to manage email marketing, contact lists, dynamic templates, and email analytics via SendGrid's API.
    21
    221 npm
    31
    ISC
  • A
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    quality
    B
    maintenance
    Enables sending transactional emails, managing templates, suppression lists, sending domains, webhooks, subaccounts, and retrieving account metrics via the SparkPost API.
    20
    11 npm
    MIT