Toggle sending accounts and signatures in Mail via hot keys
As with most e-mail clients, Apple's Mail program supports multiple accounts so you can access all of your e-mail from one program, and as such it is not uncommon for people to have different accounts configured for work, home, and other activities that they would like to keep separate. While convenient in some respects, there are times when composing messages using multiple accounts can have you redundantly selecting the account to send from.
By default Mail should use the current selected account as the "From" account when replying to a message, so managing replies or forwarding messages … Read more