Overview
- Eliminate provider lock-in and route outbound emails across multiple providers with automatic failover, ensuring uninterrupted delivery through Sendmux's HTTP or SMTP protocols.
- Keep AI agents focused on content, not formatting, by stripping signatures and quoted history while making raw message contents, links, headers, and attachments available on demand.
- Stop polling loops with signed webhooks for server delivery and an SSE stream for real-time mailbox updates, enabling instant state synchronization for your AI agents.
- Control email traffic precisely by binding mailbox keys to specific providers or delivery groups, then applying provider weights and quotas to manage send volume.
- Create agent-shaped mailboxes on verified domains or shared agent-specific domains, giving each AI agent a distinct identity without domain management overhead.
- Ensure safe HTTP retries with Idempotency-Key support, preventing duplicate sends even during network interruptions for reliable outbound email delivery.
Pros & Cons
Pros
- Agent-shaped mailboxes
- Unified API surface
- Outbound routing flexibility
- Automatic failover
- Raw message content access
- Strip signatures and quoted history
- HTTP or SMTP protocols support
- Idempotency-Key for HTTP retries
- Mailbox key binding
- Provider weights and quotas
- Eliminates need for polling loops
- Signed webhooks for server delivery
- SSE stream for real-time updates
- Typed change polling
- Option to bring your own providers
- Eliminates provider lock-in
- Covers services previously disjointed
- Allows provider routing across multiple accounts
- Agent inbox creation
- Clean JSON format emails
- Strips HTML noise from incoming mails
- Supports mail control via API
- Dedicated mailboxes for each agent
- Unified inbox for all agents
- Supports keyboard-driven view
- Inbox search across the fleet
Cons
- Lacks explanatory documentation
- No multi-language support
- Complex setup process
- UI not user-friendly
- No integration guidance
- Absence of trial version
- Cost per email sent
- No dedicated support channel
- Absence of offline capabilities
- No customization options
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❓ Frequently Asked Questions
Sendmux is an Email API built to cater for AI agents. This platform is primarily designed to unify tasks like outbound mails, agent mailboxes, routing control, and delivery events. It allows users to create agent-shaped mailboxes on verified domains or shared agent-specific domains. It also enables users to free themselves from provider lock-ins by allowing the use of mailbox over HTTP or SMTP protocols to send mails.
Sendmux works by offering a unified API surface that simplifies tasks related to outbound mails, agent mailboxes, routing control, and delivery events. It allows users to create agent-shaped mailboxes, which can be created on verified domains or shared agent-specific domains. Sendmux supports both HTTP and SMTP protocols for outbound emails and allows users to break free from provider lock-ins. It ensures safe HTTP retries through Idempotency-Key support. Sendmux also continuously updates its user's status through server delivery using signed webhooks, an SSE stream, and typed change polling.
A key feature of Sendmux is its ability to create agent-shaped mailboxes on either verified domains or shared agent-specific domains. It provides a unified API surface that simplifies tasks related to outbound mails, agent mailboxes, routing control, and delivery events. Furthermore, Sendmux not only ensures that the raw message contents are available upon request but also facilitates tasks like stripping signatures and quoted history, optionally making links, headers, and attachments available.
For outbound emails, Sendmux enables users to break free from provider lock-ins, enabling sending from a mailbox over HTTP or SMTP protocols. With its Idempotency-Key support, Sendmux ensures safe HTTP retries. It incorporates considerations into the messaging routing, allowing users to bind a mailbox key to all active providers, selected providers, or delivery groups, thereby implementing control measures such as provider weights and quotas to manage traffic.
In Sendmux, users can create agent-shaped mailboxes on either verified domains or shared agent-specific domains. Users have the flexibility to customize their domains to better manage and segregate their emails tailored to their respective needs.
Yes, Sendmux ensures that raw message contents are made available upon request. This feature enhances the user's control over how they receive and manage their emails, ensuring that no crucial information is overlooked or lost in the process.
Sendmux facilitates a multitude of tasks related to emails. Aside from making raw message contents available upon request, it aids in tasks like stripping signatures and quoted history. It also has the capability to make links, headers, and attachments available, increasing the adaptability and relevance of sent messages according to the users' preferences.
Sendmux incorporates several routing considerations into its messaging structure. It allows users to bind a mailbox key to all active providers, selected providers, or delivery groups. Further, it lets users implement controls like provider weights and quotas to effectively manage traffic.
Sendmux eradicates the need for polling loops by utilizing signed webhooks for server delivery, an SSE stream for real-time mailbox clients, and typed change polling for clients that need to resynchronise their state. These features work together to provide a seamless experience where continuous polling loops are now a thing of the past.
Yes, Sendmux enables you to bring in your own email providers. It provides the users with the flexibility to choose their preferred providers, promoting greater control over how they send their emails and manage their communications.
Sendmux offers substantial flexibility in terms of provider routing. The system allows users to break free from provider lock-ins and send from a mailbox over either HTTP or SMTP protocols. It also gives users the freedom to bring their own providers or route across multiple accounts, ensuring adaptability and customization in accordance with their personal or business communication requirements.
Sendmux employs Idempotency-Key support to ensure safe HTTP retries. This feature ensures that commands meant to be executed only once do not inadvertently get executed multiple times due to network issues. This supports the reliability and accuracy of Sendmux's email services.
For server delivery, Sendmux utilises signed webhooks, eliminating the need for polling loops. It uses an SSE stream for real-time mailbox clients ensuring immediate communication without delay. In instances where a client needs to resynchronise state, Sendmux provides typed change polling.
Using Sendmux's unified API surface provides several advantages, including simplifying tasks related to outbound mails, agent mailboxes, routing control and delivery events. It further helps users coordinate several services that were previously disjointed, allowing AI agents to focus on the content rather than parsing formatting. Ultimately, Sendmux's unified API surface helps streamline users' operations in an efficient and manageable manner.
In Sendmux, Agent mailboxes are managed through a unified API interface that allows users to perform a variety of tasks easily. This includes creating agent-shaped mailboxes in verified domains or shared agent-specific domains, leveraging provider weights and quotas for traffic management, and obtaining raw message contents upon request.
Sendmux provides a unified API surface that simplifies tasks related to outbound mails, agent mailboxes, routing control, and delivery events. It allows users to create agent-shaped mailboxes and enables sending from a mailbox over either HTTP or SMTP protocols. It incorporates messaging routing considerations and ensures safe HTTP retries through Idempotency-Key support. Sendmux also uses signed webhooks for server delivery, an SSE stream for real-time mailbox clients, and typed change polling when a client needs to resynchronize its state.
Sendmux handles automatic failovers by providing outbound routing through user-designated providers. In case one provider faces issues, Sendmux ensures that service continues with minimal disruption, automatically rerouting communications via other active providers. This feature ensures uninterrupted service under any circumstances.
Sendmux simplifies outbound mails by allowing users to send from a mailbox over HTTP or SMTP protocols, thereby breaking free from provider lock-ins. It also ensures safe HTTP retries through Idempotency-Key support. These features streamline the sending process, making it easier and more flexible for users.
Sendmux offers several control measures to manage traffic. It allows users to implement provider weights and quotas, enabling them to maintain traffic within set boundaries. Users can bind a mailbox key to all active providers, selected providers, or delivery groups, offering greater control and flexibility in distributing and managing their emails.
In Sendmux, AI agents can focus on the content rather than parsing formatting due to its feature of making raw message contents available upon request. As it facilitates tasks like stripping signatures and quoted history, AI agents can concentrate on the content and intent of the messages, thereby ensuring a more effective and targeted communication strategy.
Pricing
Pricing model
Paid
Paid options from
$0.15/unit
Billing frequency
Pay-as-you-go
Refund policy
No Refunds
