Changelog

2026-01

SMTP relay — Send transactional email over SMTP on port 587. Authenticate with apikey as the username and your secret key as the password.
Inbound routing — Receive inbound email at your verified domain and forward it to a webhook endpoint.
Preference center — Hosted unsubscribe page automatically linked in campaign footers.
A/B testing — Test up to 5 subject line variants on a campaign before sending to the full audience.
Warm-up schedules — Automatically ramp sending volume on new domains to build reputation.

POST /v1/contacts now performs an upsert by email address — no more duplicate errors on re-import.
Webhook payloads now include messageId for correlation with your email provider.
Campaign stats are now available via GET /v1/campaigns/:id — no separate stats endpoint required.

Segments — Dynamic contact segments based on tag, subscription status, or custom data.
Templates — Reusable HTML templates referenced by ID in campaign and transactional send requests.
Contact tags — Attach arbitrary string tags to contacts for filtering and segmentation.

Initial API launch. Core endpoints: /v1/send, /v1/contacts, /v1/domains, /v1/api-keys.