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About

Maildoso provides outbound mailboxes built for cold email, combining SMTP and Google Workspace infrastructure, fast setup, strong deliverability, and automated technical configuration. It helps teams diversify their sending strategy with reputable mailboxes built specifically for cold outreach, so campaigns are not dependent on one sender type, domain, or provider. Users can register domains directly in the dashboard or connect their own, enter mailbox names, and have SPF, DKIM, and DMARC auto-configured so mailboxes are ready to export and use with outreach platforms in minutes. Maildoso supports SMTP mailboxes, Google Workspace mailboxes, and combined setups, giving teams flexibility based on their sending strategy and target audience. It connects with popular sequencers and outreach tools such as Instantly, Smartlead, Saleshandy, and others, making it easier to move newly created mailboxes into active campaigns.

About

Sendmux gives AI agents their own inbox and a controlled way to send email. Each agent can receive messages, read threads, handle attachments, send replies, and react to new mail through signed webhooks or Server-Sent Events. Teams can send through Gmail OAuth, Outlook OAuth, SMTP providers, or managed Amazon SES. Sendmux can spread sending across providers with weighted routing, sender-domain routing, health checks, failover, and quotas by second, minute, hour, or day. Developers get Mailbox, Sending, and Management APIs, OpenAPI docs, SDKs, the sendmux CLI, MCP tools, and Sendmux Skills. The platform also covers tenant isolation, mailbox-scoped API keys, custom domains, logs, metrics, and usage-based pricing with no per-seat or per-mailbox fees.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

B2B sales teams and agencies that need to build, automate, and scale cold email infrastructure with deliverability-optimized domains and mailboxes

Audience

AI agent builders that need an email API for AI agents

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Supported
24/7 Live Support Supported
Online Supported

API

Offers API Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

$90 per month
Free Version Not Supported
Free Trial Not Supported

Pricing

$0.15 per 1000 emails
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Supported
In Person Supported

Company Information

Maildoso
United States
maildoso.ai/

Company Information

Sendmux
Founded: 2026
Australia
sendmux.ai

Alternatives

Alternatives

EmailLabs

EmailLabs

Vercom
SendHQ

SendHQ

Vynara Technologies
SendPost

SendPost

SendWorks

Categories

Cold Email Supported

Categories

Agentic AI Supported
Email APIs Supported

Integrations

Gmail Supported
Microsoft Outlook Supported
Apollo Supported
Claude Not Supported
FetchSandbox Not Supported
Front Supported
Google Workspace Supported
Instantly Supported
LangChain Not Supported
Model Context Protocol (MCP) Not Supported
Python Not Supported
Ruby Not Supported
Saleshandy Supported
Slack Not Supported
Smartlead.ai Supported
Vercel AI SDK Not Supported
Woodpecker Supported
Zapier Not Supported
lemlist Supported
n8n Not Supported

Integrations

Gmail Supported
Microsoft Outlook Supported
Apollo Not Supported
Claude Supported
FetchSandbox Supported
Front Not Supported
Google Workspace Not Supported
Instantly Not Supported
LangChain Supported
Model Context Protocol (MCP) Supported
Python Supported
Ruby Supported
Saleshandy Not Supported
Slack Supported
Smartlead.ai Not Supported
Vercel AI SDK Supported
Woodpecker Not Supported
Zapier Supported
lemlist Not Supported
n8n Supported
Claim Maildoso and update features and information
Claim Maildoso and update features and information
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Claim Sendmux and update features and information