macOS Mail: Reply All sends a copy to your mailbox

Problem

Some WWU employees have found that when they use the Reply-All feature in the Mail app for macOS, it sends a copy of the message to their own mailbox.This likely started in December 2018, when employee FROM/Reply-To addresses changed from First.Last@wwu.edu to username@wwu.edu 

Solution

Edit your mail account settings to use your username@wwu.edu to send messages

Open the Mail app and click MAIL > PREFERENCES, and then click ACCOUNTS

Your email address listed here should be username@wwu.edu. If it says First.Last@wwu.edu, edit the email address to correct it.

Close the Accounts window, and try the Reply-All function again.