Email API comes packed with features designed for developers and businesses.
Automatic failover across SMTP, SendGrid, Mailgun, and SES. If one provider degrades, the next takes over in under 200ms — delivery never stops.
Every outbound email gets a cryptographic hash-chain proof. Recipients verify authenticity with one click. Stops BEC, CEO fraud, and spoofing at the protocol level.
Full authentication suite with automatic key rotation. Guided DNS setup wizard gets your domain verified in under 5 minutes.
Real-time inbox placement tracking across Gmail, Outlook, Yahoo, and 50+ ISPs. Spam score testing before every campaign. IP warmup scheduling built in.
Handlebars-powered templates with dynamic variables, conditional blocks, and HTML/text dual rendering. Lock templates to prevent unauthorized modifications.
Delivery, open, click, bounce, and complaint events pushed to your endpoint instantly. HMAC-signed payloads. Exponential backoff retries with dead-letter replay.
IMAP integration with automatic RFC822 parsing. Route inbound emails to webhooks, extract attachments, and trigger automated response flows.
Automatic hard bounce and complaint suppression. Import/export lists. Global suppression database prevents re-sending to problematic addresses.
Per-tenant API keys, rate limits, and deliverability isolation. Each tenant gets dedicated IP pools and reputation tracking. One platform, zero cross-tenant contamination.
Split test subject lines, content, and send times. Auto-select winning variants based on open/click rates. Statistical significance calculations built in.
Start building with Email API today. Free tier available.