We will apply an update to gitlab on THU 30. July 2020 evening. This update will send Confirmation emails for registered email addresses in gitlab to some users. The reason for this is a bug in an older version of gitlab which allowed users to circumvent the confirmation of their email addresses until the bug was fixed. The current update sends the aforementioned confirmation emails to all users who could have used this bug. You need to confirm all email adresses registerd in your gitlab account to regain access to it.