May 31, 2016 - Open Mail app in Mac OS X if you haven't done so already. Pull down the “Mail” menu and choose “Preferences” Go to the “Composing” tab. Look for “Send new messages from:” and pull down the 'Account of selected mailbox' dropdown menu to select the email address to use as the new default.

Mac Mail can be configured to send and receive email from all your other email accounts in addition to your Mac Mail account. You might have a Gmail, Yahoo, and Outlook email account delivering your mail to those addresses to your Mac Mail app. When it comes time to reply to one of them, you most likely want to use the email address the sender used to contact you.  Realtime for mac download. Mac Mail makes it easy to send a message from. Android sdk for mac os x. Just click in the From field of any new message and choose the email address you want for the email from the drop-down menu.