Support
How to set up email on Apple (Mac Mail)

Open the MAC Mail App (envelope or postage stamp icon – depending on MAC OS version)

For choose a mail provider account, select other mail account and click continue.

Fill in your name, email address, and password. Then click sign in.
It will give you an error of “unable to verify account name and password”.

This is because you need to enter in further information to set up account.
Fill in as follows:
Email address: should already be filled in
Username: bmts email address without @bmts.com
Password: should already be filled in
Account Type: IMAP
Incoming Mail Server: mail.bmts.com
Outgoing Mail Server: smtp.bmts.com
Click Sign In when completed

MAC Mail will now attempt to set up mail account.
If you get error, make sure password is entered correctly. Note: password is case sensitive.
If successful, you will be asked to select apps to use with this account. It is OK to choose both Mail & Notes.
Click Done to complete setup, and you should see mail coming to your Inbox.