Apple ID, @gmail.com, @me.com, and mail's recognition
On my 2015 Mac, when using the mail application, it recognized my @gmail.com account and my @me.com account. The @gmail.com account was my original Apple ID. The @me.com address was a separate email account I had created as a separate account. My newer MBP - 2020, when logging in, automatically asks for my iCloud account which is connected via my @gmail.com Apple ID. Anytime I go to add a separate internet account and add my @me.com email so I can have those emails populate as a separate email account under mail, it reverts back to my @gmail account. Only way to access my @me.com email is to go to iCloud.com, then mail. The gmail emails populate in the Mail app as iCloud emails but not my @me.com emails.
Confused? I sure am. Please help!
MacBook Pro