How does it do this? What rules or logic is it using? About half way down is Send new messages from: By default, this is set to Automatically select the best account. Go to the Mail menu and select Preferences. One account will be selected for you, but why that one? Is it random? Is it the last one you used? Is it the default account? The answer is quite straightforward and it is quite clever when you know how it chooses the account to use. The question is, how to Mail know which email account you want to send the email from? It is mostly blank, but the From address is automatically filled in. Do you know them all?Ĭlick the Compose New Message button in Mac Mail and a new messages is created. When you have several email accounts set up in the Mail app on the Apple Mac, there are several shortcuts for choosing which account email is sent from.
