Some of our customers (early adopters using already version 5.25) may experience issues with sending emails at their accounts

Issue was affecting very small number of customers running already on newest 5.25 version (version 5.25 is not yet officially released and so far used only by very few customers). In case of bigger attachment (20+ MB) added to an email, email queue get stuck in the outbox and new emails from the affected email address were not being send until the stucked outbox was manually resolved by a hoftix. there will be an urgent bugfix released for 5.25 within the next days, before we would update any additional customers to this version.