In yahoo mail, you can send high priority emails by marking them as high importance. when composing a new email, click on the three dots in the toolbar at the bottom of the email.. Look for linked accounts or connected services and remove any at&t.
Not recieving certains mail i'h added recently tow alias mail in yahoomail, but i'm having some difficulty receiving mail on these alias addresses from outlouk.fr (office 365).. First, let's create an address book entry for easily addressing undisclosed recipients: