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This guide gets a new team to its first tracked email. Use the shared domain for a fast test, or add your own domain first if you want a branded sender.
Sign in at app.sendmux.ai before you start. You need a team with access to sending and receiving settings.
Managed Amazon SES is for transactional email only. Use your own provider for marketing, newsletters, or bulk promotional sends.

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What you will set up

  • A team workspace.
  • A mailbox with a one-time password.
  • A test message sent through the Sending API.
  • A delivery log entry you can search and export.
  • Optional webhooks for delivery events.
1

Create or choose a team

Open Teams, then create a team or choose an existing one. Team roles decide which pages and actions you can use.See Teams and access if you need to invite someone or change roles.
2

Create a mailbox

Open Mailboxes and select Create mailbox.Pick a verified custom domain, or use the shared myagent.mx domain for a quick test. Choose a storage quota, then create the mailbox.Sendmux shows the first mailbox password once. Store it now. You can create more mailbox passwords later, but you cannot reveal an old password again.See Mailboxes for sender identity, storage, and sender rules.
3

Send a test email

Use the mailbox password as the bearer token for the Sending API.
curl -X POST https://smtp.sendmux.ai/api/v1/emails/send \
  -H "Authorization: Bearer smx_mbx_your_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "from": { "email": "hello@myagent.mx", "name": "Your App" },
    "to": { "email": "you@example.com", "name": "Your Name" },
    "subject": "Hello from Sendmux",
    "html_body": "<p>It works.</p>",
    "text_body": "It works."
  }'
A successful response returns 201 Created with an eml_ message ID.
4

Check delivery

Open Logs and search for the eml_ message ID. Logs show sender, recipient, status, provider, attempts, and timestamp.Use Export CSV when you need a filtered copy of the log data.
5

Add a webhook

Open Webhooks and create a subscription if your application needs delivery events.Copy the signing secret when it appears. Sendmux will not show it again. Always verify webhook signatures before processing events.

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Next steps

Domains

Verify a custom domain for branded sending and inbound mail.

API keys

Create scoped keys for sending, monitoring, and automation.

Delivery logs

Search, filter, refresh, and export delivery activity.

Webhooks

Receive signed events for deliveries and inbound mail.