How can I edit my address options for sending mail in Mac Mail?

I've had a mac.com address for many years. I also have an alias for my business mail. Since iCloud, every time I go to send an email, I have to select from mac.com, me.com, or iCloud.com versions of both addresses. I am not interested in changing to either 'me.com' or 'iCloud.com', and would prefer to see only what I use. Any suggestions?