Open Sendmux
Manage teams, sending, receiving, billing, API keys, and webhooks.
Set up your workspace
Quickstart
Create a team, add a mailbox, send a test email, and check the result.
Teams and access
Invite members, assign roles, and manage team access.
API keys
Create scoped keys for sending, management, and mailbox access.
Account settings
Update your profile, sessions, password, and passkeys.
Billing
Top up balance, configure alerts, and review transactions.
Team limits
Understand defaults, increase requests, and hard limits.
Receive email
Domains
Add and verify custom domains for sending, receiving, or both.
Mailboxes
Create addresses, set sender identity, and control sender rules.
Mailbox API
Send, read, and manage messages for one mailbox.
Mailbox push delivery
Review the push delivery option shown during mailbox setup.
Send email
Sending accounts
Use the managed route, add or import accounts, and monitor health.
Delivery groups
Route selected keys or mailboxes through grouped providers.
Send by HTTP
Queue single or batch messages with JSON requests.
Send via SMTP
Connect existing apps and mail clients with SMTP settings.
Attachments
Add files to HTTP send requests.
Idempotency
Make retries safe for mutating API requests.
Monitor and automate
Dashboard and logs
Monitor activity, filter delivery logs, and export log data.
Deliverability
Watch bounce rates, complaint rates, and provider health.
Webhooks
Subscribe to events and review delivery attempts.
Verify signatures
Verify webhook deliveries before trusting payloads.
AI integrations
Install Sendmux skills or connect AI tools.
Agent access
Let agents follow
auth.md, invite an owner, and request owner-approved sending.API references
Sending API
Send single or batch email from apps.
Management API
Manage teams, keys, billing, and logs.
Mailbox API
Send and manage mailbox messages, and read threads.