Best Alternatives to Assistant Mail MCP

AgentPing

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Let your AI agent notify you by email, Slack, Discord, or webhook. One tool: send_notification.

Abnormal Security MCP

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Abnormal Security email threats, cases, and reporting in your terminal and your AI agents.

Palmyr

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Agent infra: email, phone, social, domains, VPS, wallets. Paid per-action via x402, no API key.

Line Bot MCP Server

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Verified

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

Mailappmcp

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MCP server for macOS Mail.app — gives Claude native email access via AppleScript

SenderKit

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Build and send email, SMS, and push straight from your AI agent.

Atomic Mail

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Programmable email inbox for AI agents — JMAP, PoW auth, stdio MCP server.

Agent Cold Email

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Agent-native cold-email infrastructure: domains, mailboxes, warmup, sequences, replies via 17 tools

Microsoft Outlook MCP

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Microsoft Outlook (mail) MCP server — read, search, and send email through Microsoft Graph.

Mailbuttons

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Governed email for AI agents: sandbox inboxes, server-side policy gate, tamper-evident audit.

Lumail

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

Slack MCP Server

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