Note: Mail for Mac ≠ Mail for M365(Microsoft)

Run application MAIL
Click Mail >> Add account

Select Other Mail Account and click [Continue].

Table: Example Configuration

TypeInfomation
Nameuser@your-domain.com
E-mail addressuser@your-domain.com
User Nameuser@your-domain.com
Incoming mail servermail.your-domain.com
Outgoing mail servermail.your-domain.com
Password*******

Add new account and password and click [Sign in].

Click drop down Account type select IMAP.
Incoming and Outgoing Mail server for Example table and click [Sign in].

Click Done to Finish add new account.