We have multiple queues set up in JSM (cloud) and they are tied to distribution list emails. Within the past day or so, all of the members of the distro list are suddenly getting emails about a verification code. The main email accounts for the queues do not have an inbox - they are just distribution groups, so no way to enter the code for the JSM user account. Some of these were set up several years ago and are a managed domain, so I'm not what what change has prompted this behavior now. Any thoughts or ideas?