Scheduled maintenance - Collstream from 2026-06-27 22:00 BST to 2026-06-28 04:00 BST

Scheduled maintenance on the Collstream platform. The platform will be fully unavailable for the duration of the window while network equipment is replaced. Sends, API calls, and inbound traffic will fail during this period.

What to do: Pause non-critical sends, or schedule them for outside the window.

If the change does not complete in this window, a contingency window is scheduled for Saturday 4 July 2026, 22:00 BST → Sunday 5 July 2026, 04:00 BST