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What is Sendmux?

Sendmux offers specialized inboxes for AI agents along with an efficient framework for email communication. Each agent can handle incoming messages, assess conversation threads, organize attachments, respond to emails, and interact with new mail via signed webhooks or Server-Sent Events. Teams have the option to send emails using various methods, including Gmail OAuth, Outlook OAuth, SMTP services, or managed Amazon SES, providing them with flexibility in their email operations. Furthermore, Sendmux allows for the distribution of email sending across multiple providers through features like weighted routing, sender-domain routing, health checks, failover strategies, and customizable quotas that can be set for different timeframes such as seconds, minutes, hours, or days. Developers benefit from a suite of tools including Mailbox, Sending, and Management APIs, extensive OpenAPI documentation, SDKs, the sendmux CLI, and MCP utilities, along with Sendmux Skills. Additionally, the system guarantees tenant isolation, offers mailbox-specific API keys, accommodates custom domains, and features robust logging and metrics, all while adhering to a usage-based pricing structure that avoids charging per seat or mailbox. This thorough design not only streamlines email management for teams and developers but also enhances their overall communication efficiency. By prioritizing flexibility and functionality, Sendmux positions itself as a pivotal tool in the landscape of email communication solutions.

What is Dead Simple Email?

Dead Simple Email provides an innovative email API that enables the creation of authentic email inboxes specifically designed for AI agents and automated processes. Users can effortlessly establish an inbox and interact using legitimate email addresses through either REST or standard IMAP/SMTP protocols with a single API call, and they receive responses formatted as structured webhooks. Before delivery, incoming messages are screened for prompt injection, ensuring security and reliability. Additionally, users can monitor all communications for each agent through an accessible dashboard that tracks the entire history of interactions. The service kicks off with a complimentary plan allowing for 5 inboxes, and users have the option to upgrade to 100 inboxes for a monthly fee of $29, emphasizing a pricing model based on the number of inboxes instead of user count. This versatility positions it as an attractive solution for businesses seeking to integrate email capabilities into their automated workflows efficiently. Moreover, the user-friendly interface and comprehensive features make it suitable for a variety of applications across different industries.

Media

Media

No images available

Integrations Supported

Model Context Protocol (MCP)
Claude
Codex CLI
FetchSandbox
Gmail
LangChain
Microsoft Outlook
Python
Ruby
Slack
Vercel AI SDK
Zapier
n8n

Integrations Supported

Model Context Protocol (MCP)
Claude
Codex CLI
FetchSandbox
Gmail
LangChain
Microsoft Outlook
Python
Ruby
Slack
Vercel AI SDK
Zapier
n8n

API Availability

Has API

API Availability

Has API

Pricing Information

$0.15 per 1000 emails
Free Version
Free Trial Offered?

Pricing Information

$29/month (100 inboxes)
Free Version
Free Trial Offered?

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Sendmux

Date Founded

2026

Company Location

Australia

Company Website

sendmux.ai

Company Facts

Organization Name

Dead Simple Email LLC

Date Founded

2026

Company Location

United States

Company Website

deadsimple.email

Categories and Features

Categories and Features

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