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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 Maildoso?

Maildoso provides customized outbound mailboxes specifically designed for cold emailing, featuring an integration with SMTP and Google Workspace for rapid setup, superior deliverability, and automatic technical configuration. By allowing teams to broaden their outreach tactics, Maildoso guarantees that their campaigns won't be dependent on a single sender, domain, or service provider. Users can easily create new domains or connect their current ones through the user-friendly dashboard, designate mailbox names, and automatically set up SPF, DKIM, and DMARC, enabling mailboxes to be prepared for export and implementation in outreach platforms in just minutes. The platform supports a variety of configurations, including SMTP mailboxes, Google Workspace mailboxes, and hybrid setups, granting teams the adaptability needed to cater to their audience and preferred sending techniques. Furthermore, Maildoso integrates smoothly with well-known sequencers and outreach solutions like Instantly, Smartlead, and Saleshandy, which streamlines the process of transitioning newly established mailboxes into active campaigns. This efficient workflow not only accelerates the setup but also significantly boosts the effectiveness of teams' cold outreach initiatives, making it easier than ever to connect with potential clients.

Media

Media

Integrations Supported

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

Integrations Supported

Gmail
Microsoft Outlook
Apollo
Close
Front
Google Workspace
Instantly
Nureply
Saleshandy
Smartlead.ai
Woodpecker

API Availability

Has API

API Availability

Has API

Pricing Information

$0.15 per 1000 emails
Free Version

Pricing Information

$90 per month

Supported Platforms

SaaS

Supported Platforms

SaaS

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars

Company Facts

Organization Name

Sendmux

Date Founded

2026

Company Location

Australia

Company Website

sendmux.ai

Company Facts

Organization Name

Maildoso

Company Location

United States

Company Website

maildoso.ai/

Categories and Features

Agentic AI

Not specified

Email APIs

Not specified

Categories and Features

Cold Email

Not specified

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