email sending via smtp relay with domain validation, message delivery tracking and event webhooks, batch email sending with template rendering, email validation and list hygiene, mailing list management and subscriber operations, domain configuration and dns record management, suppression list management (bounces, complaints, unsubscribes)

Mailgun

MCP ServerFree

** - Interact with Mailgun API.

Open Source

/ 100

7 capabilities

Capabilities7 decomposed

email sending via smtp relay with domain validation

Medium confidence

Sends emails through Mailgun's SMTP infrastructure by accepting message composition parameters (recipient, subject, body, attachments) and routing them through authenticated SMTP connections. The MCP server translates client requests into Mailgun API calls that handle domain verification, SPF/DKIM configuration validation, and delivery tracking. Supports both simple text and HTML emails with inline attachments and custom headers.

Solves for

Send transactional emails from my application without managing SMTP infrastructureCompose and dispatch emails with attachments programmaticallyRoute emails through a verified domain with automatic authentication

Best for

Backend developers integrating email into SaaS applications

Teams building notification systems that need reliable delivery

Developers migrating from self-hosted SMTP to managed email services

Requires

Mailgun API key (private key with send permissions)

Pre-verified sending domain configured in Mailgun account

MCP client implementation that can invoke tool calls

Limitations

Requires pre-configured and verified domain in Mailgun account — cannot send from arbitrary domains

Attachment size limited by Mailgun's API constraints (typically 25MB per message)

No built-in retry logic at MCP layer — relies on Mailgun's backend retry behavior

What makes it unique

Exposes Mailgun's email sending as an MCP tool, allowing LLM agents and Claude to compose and dispatch emails directly without requiring custom HTTP client code. Abstracts domain verification and authentication complexity into simple tool parameters.

vs alternatives

Simpler integration path than raw Mailgun REST API for Claude-based agents; no need to manage HTTP headers or API authentication within agent code — MCP server handles credential injection.

message delivery tracking and event webhooks

Medium confidence

Retrieves delivery status, bounce records, and engagement metrics (opens, clicks, complaints) for sent messages by querying Mailgun's event API. The MCP server exposes tools to fetch event logs filtered by message ID, timestamp, or event type, enabling real-time visibility into email lifecycle. Supports webhook configuration to push delivery events to external systems.

Solves for

Check if an email was successfully delivered or bouncedTrack open and click events for marketing or transactional emailsQuery delivery logs for a specific message or time rangeSet up webhooks to react to delivery failures in real-time

Best for

Developers building email monitoring dashboards

Teams implementing bounce handling and list hygiene workflows

Marketing automation platforms tracking engagement metrics

Requires

Mailgun API key with read permissions on events

Message ID or timestamp range for querying events

Webhook endpoint URL if configuring push notifications (must be publicly accessible HTTPS)

Limitations

Event data retention depends on Mailgun plan tier — free tier has limited historical data

Webhook delivery is asynchronous and not guaranteed; requires idempotency handling on receiver side

No built-in filtering for complex queries — must iterate through events client-side for advanced filtering

What makes it unique

Provides MCP tools to query Mailgun's event API and configure webhooks, allowing Claude agents to autonomously monitor email delivery status and react to failures without polling external systems. Abstracts Mailgun's event filtering syntax into simple tool parameters.

vs alternatives

Tighter integration with Claude than building custom event polling; webhook configuration through MCP allows agents to set up reactive workflows without manual infrastructure setup.

batch email sending with template rendering

Medium confidence

Sends emails to multiple recipients with personalized content by accepting a template name, variable map, and recipient list, then invoking Mailgun's batch sending API. The MCP server handles template lookup, variable substitution, and chunking large recipient lists into API-compliant batches. Supports Mailgun's template syntax (Handlebars) for dynamic content insertion per recipient.

Solves for

Send personalized emails to a mailing list with recipient-specific variablesRender email templates with dynamic content without managing template engines locallyDispatch bulk emails efficiently using Mailgun's batch APIManage recipient variables (name, account ID, etc.) for template personalization

Best for

Marketing teams sending campaigns with personalized content

SaaS platforms sending bulk notifications (password resets, invitations)

Developers building email automation workflows that need template support

Requires

Mailgun API key with send permissions

Pre-created email template in Mailgun account

Recipient list with email addresses and variable values

Limitations

Templates must be pre-created in Mailgun account — no template creation/editing through MCP

Batch API has recipient count limits per request (typically 1000) — large lists require client-side chunking

Template variables are limited to Handlebars syntax — no custom logic or conditional rendering beyond Handlebars capabilities

What makes it unique

Exposes Mailgun's batch sending and template rendering as MCP tools, allowing Claude to compose and dispatch personalized bulk emails to multiple recipients in a single operation. Handles template variable substitution and batch chunking transparently.

vs alternatives

Simpler than managing template rendering and batch logic in application code; Claude can directly invoke batch sending without building custom template engines or batch orchestration logic.

email validation and list hygiene

Medium confidence

Validates email addresses and identifies invalid, disposable, or risky addresses using Mailgun's email validation API. The MCP server accepts email addresses or lists and returns validation results including syntax checks, domain verification, and risk scoring. Supports bulk validation for list cleaning and real-time validation for signup forms.

Solves for

Validate email addresses before adding to mailing listsIdentify and remove invalid or disposable email addresses from existing listsCheck if an email domain is legitimate and accepting mailScore email addresses for delivery risk before sending campaigns

Best for

Teams managing email lists and preventing bounce rates

SaaS platforms validating user signups

Marketing teams cleaning lists before campaigns

Requires

Mailgun API key with validation permissions

Email address or list of addresses to validate

Network access to Mailgun validation API endpoints

Limitations

Validation API has rate limits — bulk validation of large lists requires throttling

Disposable email detection is heuristic-based and may have false positives/negatives

Domain verification checks DNS records but cannot guarantee mailbox existence

What makes it unique

Integrates Mailgun's email validation API as MCP tools, allowing Claude agents to autonomously validate and score email addresses without building custom validation logic. Provides risk scoring to help agents make decisions about list quality.

vs alternatives

More comprehensive than regex-based validation; includes domain verification and disposable email detection. Tighter integration with Claude than calling validation API directly.

mailing list management and subscriber operations

Medium confidence

Creates, updates, and deletes mailing lists and manages subscriber membership through Mailgun's list API. The MCP server exposes tools to add/remove subscribers, update subscriber metadata, and query list membership. Supports subscriber variables for personalization and list segmentation.

Solves for

Create and manage mailing lists for campaignsAdd or remove subscribers from lists programmaticallyUpdate subscriber metadata and preferencesQuery list membership and subscriber details

Best for

Teams managing subscriber databases and segmentation

SaaS platforms with user mailing lists

Marketing automation systems handling list operations

Requires

Mailgun API key with list management permissions

List address (e.g., 'subscribers@example.com')

Subscriber email and optional metadata

Limitations

List operations are asynchronous — changes may not be immediately visible

Subscriber variables are limited to string values — no complex data structures

No built-in list segmentation or filtering — must manage segments manually

What makes it unique

Exposes Mailgun's list management API as MCP tools, allowing Claude agents to autonomously manage subscriber lists and membership without manual dashboard interaction. Supports subscriber metadata for personalization.

vs alternatives

Simpler than building custom list management UI; Claude can directly invoke list operations as part of automated workflows.

domain configuration and dns record management

Medium confidence

Retrieves and manages domain configuration for sending, including DNS record requirements (SPF, DKIM, CNAME) and verification status. The MCP server exposes tools to query domain settings, retrieve DNS records needed for setup, and check verification status. Does not directly modify DNS records but provides the records required for manual or automated DNS configuration.

Solves for

Check if a domain is verified and ready for sendingRetrieve DNS records needed to configure a domainVerify domain setup status and identify missing configurationsGet DKIM and SPF record details for documentation

Best for

DevOps teams setting up email infrastructure

SaaS platforms with multi-tenant email sending

Developers automating domain onboarding workflows

Requires

Mailgun API key with domain read permissions

Domain address (e.g., 'mail.example.com')

Access to DNS provider to add records (manual or via separate API)

Limitations

MCP tools are read-only — cannot directly modify DNS records

Domain verification is asynchronous — may take time after DNS records are added

DKIM rotation and key management must be handled through Mailgun dashboard

What makes it unique

Provides MCP tools to query domain configuration and DNS requirements from Mailgun, enabling Claude agents to autonomously verify domain setup and retrieve configuration details for documentation or automated DNS provisioning.

vs alternatives

Tighter integration with Claude than manual dashboard checks; agents can programmatically verify domain readiness as part of onboarding workflows.

suppression list management (bounces, complaints, unsubscribes)

Medium confidence

Manages suppression lists (bounced addresses, spam complaints, unsubscribes) by querying and updating suppression records. The MCP server exposes tools to add addresses to suppression lists, remove addresses, and query suppression status. Prevents sending to addresses known to bounce or complain, improving sender reputation.

Solves for

Add bounced or complained addresses to suppression listsCheck if an address is on a suppression list before sendingRemove addresses from suppression lists (e.g., after re-engagement)Query suppression list statistics and recent additions

Best for

Teams managing sender reputation and bounce rates

Email marketing platforms with list hygiene workflows

SaaS applications handling unsubscribe and complaint management

Requires

Mailgun API key with suppression list permissions

Email address to add/remove/check

Suppression list type (bounces, complaints, unsubscribes)

Limitations

Suppression lists are automatically populated by Mailgun from bounces/complaints — manual additions are supplementary

Removing addresses from suppression lists requires explicit action — no automatic re-engagement

Suppression data is account-wide — cannot segment by domain or campaign

What makes it unique

Exposes Mailgun's suppression list API as MCP tools, allowing Claude agents to autonomously manage suppression records and prevent sending to problematic addresses. Integrates bounce/complaint handling into agent workflows.

vs alternatives

Simpler than building custom suppression logic; Claude can directly check and update suppression status as part of sending workflows.

Capabilities are decomposed by AI analysis. Each maps to specific user intents and improves with match feedback.

Related Artifactssharing capabilities

Artifacts that share capabilities with Mailgun, ranked by overlap. Discovered automatically through the match graph.

MCP Server24

MailSandbox

** - MailSandbox (a fork of Mailpit) is a fast, zero-dependency email testing tool & API with a web UI, SMTP server, Postmark API emulation, and MCP server for AI-assisted debugging.

smtp server with email interception and storageemail delivery simulation and status tracking

2 shared capabilities

Product19

AgentMail

Email inboxes for AI agents.

email-send-and-reply-apiemail-receive-and-thread-management

2 shared capabilities

MCP Server30

agentmail-mcp

AgentMail MCP Server

email-sending-with-template-support

1 shared capability

Agent41

tiledesk-server

Tiledesk Server is the main API component of the Tiledesk platform 🚀 Tiledesk is an open-source alternative to Voiceflow, allowing you to build advanced LLM-powered agents with easy human-in-the-loop (HITL) when necessary.

email notification system with template rendering and smtp integration

1 shared capability

Product19

Profile of the company

[Documentation](https://docs.airplane.dev/?utm_source=awesome-ai-agents)

email notification delivery with template rendering

1 shared capability

Product31

Reply.io

Automate sales outreach, analyze performance, integrate...

email deliverability optimization

1 shared capability

Best For

✓Backend developers integrating email into SaaS applications
✓Teams building notification systems that need reliable delivery
✓Developers migrating from self-hosted SMTP to managed email services
✓Developers building email monitoring dashboards
✓Teams implementing bounce handling and list hygiene workflows
✓Marketing automation platforms tracking engagement metrics
✓Marketing teams sending campaigns with personalized content
✓SaaS platforms sending bulk notifications (password resets, invitations)

Known Limitations

⚠Requires pre-configured and verified domain in Mailgun account — cannot send from arbitrary domains
⚠Attachment size limited by Mailgun's API constraints (typically 25MB per message)
⚠No built-in retry logic at MCP layer — relies on Mailgun's backend retry behavior
⚠Synchronous sending only — no native support for scheduled/delayed delivery through MCP interface
⚠Event data retention depends on Mailgun plan tier — free tier has limited historical data
⚠Webhook delivery is asynchronous and not guaranteed; requires idempotency handling on receiver side

Requirements

Mailgun API key (private key with send permissions)Pre-verified sending domain configured in Mailgun accountMCP client implementation that can invoke tool callsNetwork access to Mailgun API endpoints (api.mailgun.net)Mailgun API key with read permissions on eventsMessage ID or timestamp range for querying eventsWebhook endpoint URL if configuring push notifications (must be publicly accessible HTTPS)Mailgun API key with send permissions

Input / Output

Accepts: structured JSON with email fields (to, from, subject, text/html, attachments), recipient list (single or multiple addresses), file paths or base64-encoded attachment data, message ID (string), event type filter (e.g., 'delivered', 'bounced', 'opened', 'clicked'), timestamp range (ISO 8601 format), webhook configuration object (URL, event types to subscribe), template name (string), recipient list (array of objects with email and variables), variable map (object with template variable names and values), single email address (string), list of email addresses (array of strings), validation options (syntax check, domain check, risk scoring), list address (string), subscriber email (string), subscriber metadata (object with custom variables), operation type (add, remove, update), domain name (string), domain type (sending or receiving), email address (string), suppression type (hard_bounce, soft_bounce, complaint, unsubscribe), reason or note (optional)

Produces: structured JSON response with message ID and delivery status, error details if validation or sending fails, structured JSON array of events with timestamp, event type, and metadata, webhook registration confirmation, error details if message not found or API limit exceeded, batch job ID and status, structured JSON with per-recipient delivery status, error details for failed recipients, structured JSON with validation result per address, risk score (0-100) indicating delivery likelihood, detailed validation reason (invalid syntax, domain not found, disposable, etc.), operation confirmation with subscriber ID, list membership status, error details if operation fails, structured JSON with domain configuration, DNS records required (SPF, DKIM, CNAME, MX), verification status and any errors, suppression status (is_suppressed: true/false), suppression type and timestamp, operation confirmation

UnfragileRank

Adoption15%(30% weight)

Quality16%(25% weight)

Ecosystem30%(25% weight)

Match Graph10%(15% weight)

Freshness75%(5% weight)

UnfragileRank is computed from adoption signals, documentation quality, ecosystem connectivity, match graph feedback, and freshness. No artifact can pay for a higher rank.

Type: MCP Server

7 capabilities

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** - Interact with Mailgun API.

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Capabilities7 decomposed

email sending via smtp relay with domain validation

Medium confidence

Solves for

Best for

Backend developers integrating email into SaaS applications

Teams building notification systems that need reliable delivery

Developers migrating from self-hosted SMTP to managed email services

Requires

Mailgun API key (private key with send permissions)

Pre-verified sending domain configured in Mailgun account

MCP client implementation that can invoke tool calls

Limitations

Requires pre-configured and verified domain in Mailgun account — cannot send from arbitrary domains

Attachment size limited by Mailgun's API constraints (typically 25MB per message)

No built-in retry logic at MCP layer — relies on Mailgun's backend retry behavior

What makes it unique

vs alternatives

Simpler integration path than raw Mailgun REST API for Claude-based agents; no need to manage HTTP headers or API authentication within agent code — MCP server handles credential injection.

message delivery tracking and event webhooks

Medium confidence

Solves for

Best for

Developers building email monitoring dashboards

Teams implementing bounce handling and list hygiene workflows

Marketing automation platforms tracking engagement metrics

Requires

Mailgun API key with read permissions on events

Message ID or timestamp range for querying events

Webhook endpoint URL if configuring push notifications (must be publicly accessible HTTPS)

Limitations

Event data retention depends on Mailgun plan tier — free tier has limited historical data

Webhook delivery is asynchronous and not guaranteed; requires idempotency handling on receiver side

No built-in filtering for complex queries — must iterate through events client-side for advanced filtering

What makes it unique

vs alternatives

Tighter integration with Claude than building custom event polling; webhook configuration through MCP allows agents to set up reactive workflows without manual infrastructure setup.

batch email sending with template rendering

Medium confidence

Solves for

Best for

Marketing teams sending campaigns with personalized content

SaaS platforms sending bulk notifications (password resets, invitations)

Developers building email automation workflows that need template support

Requires

Mailgun API key with send permissions

Pre-created email template in Mailgun account

Recipient list with email addresses and variable values

Limitations

Templates must be pre-created in Mailgun account — no template creation/editing through MCP

Batch API has recipient count limits per request (typically 1000) — large lists require client-side chunking

Template variables are limited to Handlebars syntax — no custom logic or conditional rendering beyond Handlebars capabilities

What makes it unique

vs alternatives

Simpler than managing template rendering and batch logic in application code; Claude can directly invoke batch sending without building custom template engines or batch orchestration logic.

email validation and list hygiene

Medium confidence

Solves for

Best for

Teams managing email lists and preventing bounce rates

SaaS platforms validating user signups

Marketing teams cleaning lists before campaigns

Requires

Mailgun API key with validation permissions

Email address or list of addresses to validate

Network access to Mailgun validation API endpoints

Limitations

Validation API has rate limits — bulk validation of large lists requires throttling

Disposable email detection is heuristic-based and may have false positives/negatives

Domain verification checks DNS records but cannot guarantee mailbox existence

What makes it unique

vs alternatives

More comprehensive than regex-based validation; includes domain verification and disposable email detection. Tighter integration with Claude than calling validation API directly.

mailing list management and subscriber operations

Medium confidence

Solves for

Create and manage mailing lists for campaignsAdd or remove subscribers from lists programmaticallyUpdate subscriber metadata and preferencesQuery list membership and subscriber details

Best for

Teams managing subscriber databases and segmentation

SaaS platforms with user mailing lists

Marketing automation systems handling list operations

Requires

Mailgun API key with list management permissions

List address (e.g., 'subscribers@example.com')

Subscriber email and optional metadata

Limitations

List operations are asynchronous — changes may not be immediately visible

Subscriber variables are limited to string values — no complex data structures

No built-in list segmentation or filtering — must manage segments manually

What makes it unique

vs alternatives

Simpler than building custom list management UI; Claude can directly invoke list operations as part of automated workflows.

domain configuration and dns record management

Medium confidence

Solves for

Best for

DevOps teams setting up email infrastructure

SaaS platforms with multi-tenant email sending

Developers automating domain onboarding workflows

Requires

Mailgun API key with domain read permissions

Domain address (e.g., 'mail.example.com')

Access to DNS provider to add records (manual or via separate API)

Limitations

MCP tools are read-only — cannot directly modify DNS records

Domain verification is asynchronous — may take time after DNS records are added

DKIM rotation and key management must be handled through Mailgun dashboard

What makes it unique

vs alternatives

Tighter integration with Claude than manual dashboard checks; agents can programmatically verify domain readiness as part of onboarding workflows.

suppression list management (bounces, complaints, unsubscribes)

Medium confidence

Solves for

Best for

Teams managing sender reputation and bounce rates

Email marketing platforms with list hygiene workflows

SaaS applications handling unsubscribe and complaint management

Requires

Mailgun API key with suppression list permissions

Email address to add/remove/check

Suppression list type (bounces, complaints, unsubscribes)

Limitations

Suppression lists are automatically populated by Mailgun from bounces/complaints — manual additions are supplementary

Removing addresses from suppression lists requires explicit action — no automatic re-engagement

Suppression data is account-wide — cannot segment by domain or campaign

What makes it unique

vs alternatives

Simpler than building custom suppression logic; Claude can directly check and update suppression status as part of sending workflows.

Capabilities are decomposed by AI analysis. Each maps to specific user intents and improves with match feedback.

Alternatives to Mailgun

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GitHub Copilot Chat53Extension

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GitHub Copilot52Extension

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Claude Code for VS Code52Extension

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Mailgun

Capabilities7 decomposed

email sending via smtp relay with domain validation

message delivery tracking and event webhooks

batch email sending with template rendering

email validation and list hygiene

mailing list management and subscriber operations

domain configuration and dns record management

suppression list management (bounces, complaints, unsubscribes)

Related Artifactssharing capabilities

MailSandbox

AgentMail

agentmail-mcp

tiledesk-server

Profile of the company

Reply.io

Best For

Known Limitations

Requirements

Input / Output

UnfragileRank

About

Categories

Alternatives to Mailgun

Are you the builder of Mailgun?

Get the weekly brief

Data Sources

Mailgun

Capabilities7 decomposed

email sending via smtp relay with domain validation

message delivery tracking and event webhooks

batch email sending with template rendering

email validation and list hygiene

mailing list management and subscriber operations

domain configuration and dns record management

suppression list management (bounces, complaints, unsubscribes)

Related Artifactssharing capabilities

MailSandbox

AgentMail

agentmail-mcp

tiledesk-server

Profile of the company

Reply.io

Best For

Known Limitations

Requirements

Input / Output

UnfragileRank

About

Categories

Alternatives to Mailgun

Are you the builder of Mailgun?

Get the weekly brief

Data Sources