SendPostSendWorks
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Related Products
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About
SendPost replaces manual workarounds, messy hacks and daily frustrations that come along with your email API/SMTP provider. See if you are sending only a few thousand emails then most email API solutions work well. You will choose one of them based on price, features or support. The real problem comes if you are one of the big senders—sending millions of emails per month. That's when managing multiple sending domains, IP-Pools and IP/Domain reputation becomes a severe headache. At that scale, even a minor dip in your email open rate or deliverability impacts your revenue. You want a solution which helps you understand what broke with your email deliverability and how you can fix it quickly. You don't want to spend hours wading through logs and manually checking if your domain or IP is blacklisted or your sending reputation is low.
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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.
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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
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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
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Audience
Platform for businesses wanting to deliver emails to their customers inboxes on time
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Audience
AI agent builders that need an email API for AI agents
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Support
Phone Support
Not Supported
24/7 Live Support
Supported
Online
Supported
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Support
Phone Support
Supported
24/7 Live Support
Supported
Online
Supported
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API
Offers API
Supported
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API
Offers API
Supported
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Screenshots and Videos |
Screenshots and Videos |
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Pricing
$7 per month
Free Version
Not Supported
Free Trial
Not Supported
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Pricing
$0.15 per 1000 emails
Free Version
Supported
Free Trial
Not Supported
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Reviews/
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Reviews/
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Supported
In Person
Not Supported
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Supported
In Person
Supported
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Company InformationSendWorks
Founded: 2016
United States
sendpost.io
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Company InformationSendmux
Founded: 2026
Australia
sendmux.ai
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Alternatives |
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Categories |
Categories |
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Integrations
Claude
Not Supported
Codex CLI
Not Supported
E-Warmup
Supported
FetchSandbox
Not Supported
Gmail
Not Supported
LangChain
Not Supported
Microsoft Outlook
Not Supported
Model Context Protocol (MCP)
Not Supported
Python
Not Supported
Ruby
Not Supported
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Integrations
Claude
Supported
Codex CLI
Supported
E-Warmup
Not Supported
FetchSandbox
Supported
Gmail
Supported
LangChain
Supported
Microsoft Outlook
Supported
Model Context Protocol (MCP)
Supported
Python
Supported
Ruby
Supported
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