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About

Test, monitor and optimize your email programs to reach more subscribers and increase your ROI with the #1 trusted email verification and all-in-one deliverability solution. Gain actionable insights by uncovering the health of your opt-in email lists to reduce bounces, protect your sender's reputation, and reach more high-quality subscribers. Prevent missed opportunities and increase your email ROI by connecting our real-time API wherever you collect email addresses online. Virtually eliminate hard bounces from fake, mistyped, or invalid email addresses. Monitor your sending domains and IP addresses for blocklistings. Real-time alerts allow you to quickly respond to resolve potential issues. Helps you determine whether your message is landing in the inbox or in spam by mailbox providers, like Gmail, Outlook and iCloud. Precheck email messages for content and design errors and spam filtering issues before sending.

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
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Companies searching for a secure and accurate email verification solution

Audience

AI agent builders that need an email API for AI agents

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

No information available.
Free Version
Free Trial

Pricing

$0.15 per 1000 emails
Free Version
Free Trial

Reviews/Ratings

Overall 4.5 / 5
ease 5.0 / 5
features 4.5 / 5
design 4.5 / 5
support 3.0 / 5

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:

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Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

Kickbox
United States
kickbox.com

Company Information

Sendmux
Founded: 2026
Australia
sendmux.ai

Alternatives

Alternatives

EmailLabs

EmailLabs

Vercom
SendPost

SendPost

SendWorks
Mail360

Mail360

Zoho

Categories

Categories

Email Verification Features

Bulk Email Verification
Catch-all Server Detection
Disposable Email Detection
Domain Check
Mail Server Validation
Single Email Verification
Spam Trap Detection
Syntax Check

Integrations

Abacum
CanopyDeploy
Causal
Cordial
GetResponse
KonnectzIT
Mailster
Model Context Protocol (MCP)
PriMailer
Stackreaction
Wufoo
ZagoMail
Zapier

Integrations

Abacum
CanopyDeploy
Causal
Cordial
GetResponse
KonnectzIT
Mailster
Model Context Protocol (MCP)
PriMailer
Stackreaction
Wufoo
ZagoMail
Zapier
Claim Kickbox and update features and information
Claim Kickbox and update features and information
Claim Sendmux and update features and information
Claim Sendmux and update features and information