---
title: "postmasterplus"
description: "Email deliverability copilot that unifies Gmail Postmaster Tools, Outlook SNDS, Validity, universal feedback loops, and DNS into one health view, across all your teams."
canonical: https://agentpluginsdirectory.com/plugins/postmasterplus
last-updated: 2026-10-04
---

# postmasterplus
Email deliverability copilot that unifies Gmail Postmaster Tools, Outlook SNDS, Validity, universal feedback loops, and DNS into one health view, across all your teams.
- Slug: postmasterplus
- Publisher: OptiPub
- Repository: https://github.com/optipub/postmasterplus-agent-plugin
- Manifest: plugin.json
- Version: 1.0.0
- License: MIT
- Category (editorial): integrations
- Skills: 0
- MCP servers: 1 (postmaster)
- Stars: 0
- Repository created: 2026-08-20
- Repository last pushed: 2026-08-20
- Publisher type: Organization
- Listing: https://agentpluginsdirectory.com/plugins/postmasterplus
- Schema: https://agent-plugins.org/schemas/1.0.0/plugin.schema.json

## What postmasterplus does, in the publisher's words

> Email deliverability copilot that unifies Gmail Postmaster Tools, Outlook SNDS, Validity, universal feedback loops, and DNS into one health view, across all your teams.

An Agent Plugins package that connects any compatible AI client (Cursor, Claude, ChatGPT, and others) to the Postmaster+ deliverability platform over its hosted MCP server.

Postmaster+ is a deliverability assistant that aggregates signals from across the sender ecosystem, Gmail Postmaster Tools, Outlook SNDS, Validity, universal feedback loops, DNS, and more, into a single live view of your sender reputation and inbox placement. Start with a bird's-eye health overview, then drill into specifics: track domains and IPs, catch blocklisted IPs, surface inactive mail streams, and monitor complaint rates and mailbox-provider compliance over time. Natural-language questions resolve to the right data via intent-specific tools, count domains, chart multi-metric trends, or ask when Gmail compliance changed, and an actionable feed shows what needs attention across every team you can access.

From the project README, punctuation lightly normalized. Full text: https://raw.githubusercontent.com/optipub/postmasterplus-agent-plugin/HEAD/README.md

## MCP servers

- postmaster: transport: streamable-http; url: https://postmasterplus.app/mcp/postmaster

Read from the plugin's own mcp.json. Environment variable names only, never values.