Context
Change Type: API change
Product area: Platform services
Component: REST API
Deployed at: eu.latest.cumulocity.com, apj.cumulocity.com, jp.cumulocity.com, cumulocity.com, us.cumulocity.com
Technical details
Build artifact: cumulocity (2026.128.0)
Internal ID: MTM-63637
Description
We are introducing stricter validation for user email addresses.
The part of the domain name following the ‘@’ symbol may now only contain
alphanumeric characters, hyphens, and dots.
This change ensures that system notifications - such as password resets or smart rule alerts - are delivered reliably.
Existing users will not be impacted by this change, however when setting up
new users the updated checks will be applied.