Reference this thread
Is there any one else noticing the checker is incorrectly reporting which email system they are on?
Can the moderators throw any light on the issue, is it incorrectly reporting or have the email accounts been moved?
Yes it its is reporting wrong for my email addresses .. I'm still on Yahoo mail for the only account that BT haven't lost.
Just for the record, it correctly reports BT Mail for my main and two sub-accounts.