Changelog
API, SDK, and product updates for developers. Newest first.
July 2026
12 Jul 2026
New
Broadcasts to segments
Target a saved segment directly from POST /broadcasts with segmentId. See Broadcasts.
08 Jul 2026
New
Custom tracking domain
Set trackingSubdomain via PATCH /domains/{id}. Guide: Custom tracking domain.
03 Jul 2026
Improved
Batch send partial success
Up to 100 messages per POST /emails/batch with per-item success/error reporting.
01 Jul 2026
Fixed
Webhook retries
Corrected exponential backoff timing on transient 5xx responses from your endpoint.
June 2026
20 Jun 2026
New
Test API keys
Keys prefixed xrl_dev_ sink delivery for safe integration. Guide: Test vs live keys.
12 Jun 2026
Improved
Idempotency window
Idempotency keys for send endpoints are retained for 24 hours per API key.
05 Jun 2026
New
Mailbox IMAP hostnames
Documented mail.xurelmail.co (IMAP 993 / POP 995 / SMTP 465+587) for client setup.