My sent email from is @me.com and not @mac.com. How do I force @mac.com
I have aliases of @iCloud.com, @me.com, and @Mac.com. However, when I am filling out any paperwork for a job, club, or anything else and the email is requested I have always used @Mac.com. However, I was recently informed that my email was blocked by a website because the senders address (i.e. my address) was from @me.com and not @Mac.com; so my question is how do I force the email client to show my address from my @Mac.com? I tried Mail:Preferences:Accounts and changed it in the Email Address drop down list but the @Mac.com will not 'stick' and when I close the window and go back to the account information, it is still @me.com. Same thing when I email to myself, it still says @me.com. It turns out that this has been an intermittent (but significant) problem over the years that I have not been quite aware of until today.