Everything transactional email needs, in one place.

Transactional API

A clean REST API for receipts, alerts, verification codes and notifications.

• Stable message IDs and idempotent sends
• Templates with {{placeholders}}
• Attachments up to your plan's size limit
• Automatic retries for ~17 hours on temporary failures

Universal SMTP relay

Anything that speaks SMTP can send - frameworks, CRMs, appliances, legacy systems.

• STARTTLS on 587, TLS on 465
• Same quotas, suppressions and tracking as the API
• Per-user credentials you can block or limit any time

Verified sending domains

Guided DNS setup with one-click verification. Sender ownership is enforced - mail only leaves from domains you have proven you control, which protects your deliverability.

Delivery visibility

Follow every email through accepted → delivered → opened → clicked, with bounces and complaints handled for you.

• Searchable activity and full content archive
• Charts, per-sender summaries, CSV exports
• Automatic suppression of bad addresses

Signed webhooks

Push every delivery event into your own systems in real time, verified with HMAC signatures and replay protection.

Team & controls

Invite your team with roles, protect accounts with two-factor authentication, pin API keys to allowed IPs, and set per-key rate limits.