PR & legal Weasels
>>>We do not use the content in your mailbox or in the Mail app.<<<
Emails are NOT in your mailbox/app until MS put them in there, after they arrive at a MS mail server via other internal MS infrastructure.
I'd much prefer everyone used this line.
We do not use any information within emails beyond that which is necessary for delivery using the IMAP & POP3 protocols
They will use everything they can get profile you, and use the profile to target you.