Features
Everything you need to send, receive and understand email.
One account for transactional mail, marketing email and inbound, with deliverability tools switched on from day one.
- REST API or SMTP
- One request per email or batch
- Checks limits and suppressions
- Renders templates
- Queues and retries
- Tracks opens and clicks
- Signed with your DKIM key
- Bounces reported back
- ada@example.org
- Delivered in seconds
email.sentemail.deliveredemail.openedemail.clickedemail.bouncedSend
An email API that fits into your code
Send from any language through REST or SMTP. One HTTP request is all it takes.
Read the docs →Two APIs, one account
The REST API for everyday sends, and Mail Send (v3) for per-recipient personalizations.
SMTP relay
Username apikey, password your key. Works with any framework or device.
Batch & scheduled
100 emails per request, scheduling up to 30 days ahead, reschedule or cancel.
Idempotency keys
Retry without double-sending. Responses are replayed for 24 hours.
Templates
Handlebars templates with a visual designer and full version history.
Tags & categories
Label messages and slice activity, stats and webhooks by them.
Engage
Marketing email without a second vendor
Contacts, broadcasts and automations run on the same infrastructure and reputation tools as your transactional mail.
Read the docs →What's new in November
SentHi Ada,
See what's newYou're receiving this because you subscribed to Product news · Unsubscribe
- Delivered
- 12,480
- Opened
- 46%
- Clicked
- 9.8%
Contacts & segments
Custom properties, segments, and unsubscribe status kept in sync automatically.
Topics
Opt-in and opt-out topics so people can choose what they receive.
Broadcasts
Newsletters to a segment, personalized, scheduled, with per-broadcast stats.
Automations
Visual workflows with branches, A/B splits and waits for opens, triggered by sign-ups, segments, events, email activity or dates.
Receive
Inbound email for replies and workflows
Point an MX record at Jumploon and handle incoming mail in your app.
Read the docs →Receive on any subdomain
Mail to anything@inbound.acme.com is stored and available through the API.
email.received webhooks
Get notified the moment a message arrives.
Forwarding
Forward a copy to a team mailbox, with the original sender as Reply-To.
Deliver
Deliverability built in, not bolted on
The defaults protect your sender reputation, so you spend time on your product rather than on DNS and bounce handling.
Read the docs →acme.com
Verified- DKIMjl._domainkeySigning every message
- SPFacme.comPassing
- DMARC_dmarcp=quarantine
limit 5%
limit 0.3%
Per-domain DKIM
Unique keys for every domain. Unverified domains can't send.
SPF & DMARC checks
Exact records to publish, plus automatic re-checks.
Suppressions
Bounces and unsubscribes are never mailed again.
Retries with backoff
Temporary failures are retried for up to 72 hours.
Branded tracking domain
Tracked links on your own subdomain, with automatic TLS.
One-click unsubscribe
RFC 8058 headers for Gmail and Yahoo's bulk-sender rules.
Observe
See exactly what happened to every email
From the API request to the click, every step is recorded and searchable.
Read the docs →Last 14 days
11,840 deliveredActivity feed
Every message and recipient with its full event timeline.
Statistics
Daily delivery, bounce, open and click charts, per category.
API logs
Each request with status, timing, key and error message.
Signed webhooks
Per-event endpoints or batched events, signed, retried up to 10 times, replayable.
Alerts
Email alerts on bounce rate, failure rate, quota and webhook failures.
Domain health
DNS and delivery health for each domain in one view.
Manage
Controls for teams and platforms
Keep access tight and separate workloads as you grow.
Read the docs →Scoped keys
Full-access or send-only, optionally restricted to one domain, with expiry dates.
Roles
Owner, admin and viewer roles for everyone on your team.
Subaccounts
Separate domains, keys, quotas and reporting per client or product.
Which API should I use?
Both share the same account, domains and delivery pipeline. Start with the REST API, or mix them.
| Capability | REST API | v3 API |
|---|---|---|
| Send single emails | ||
| Batch sending | — | |
| Scheduling | ||
| Idempotency keys | — | |
| Stored templates | ||
| Personalizations & custom args | — | |
| Sandbox mode | — | |
| Contacts, segments, topics | — | |
| Broadcasts & automations | — | |
| Inbound email | — | |
| Webhooks |