ActiveCampaign change history: Engineers have identified an issue with login verification emails

ActiveCampaign reported a major issue delivering login verification emails, preventing some customers requiring email verification from logging in; SMS verification remained functional. The incident began at 2025-10-28 02:56 UTC and was resolved at 2025-10-28 03:39 UTC, lasting 43 min. Engineers identified the cause and implemented a solution, without providing specifics.