To manage Email accounts in Mac Mail:
1) Mail --> Add Account

2) Pilih Other Mail Account...

3) Enter your name and Email address

4) For configuration, you can use :
Incoming Mail Server : idsmtp1.idcloudhosting.com
Outgoing Mail Server : idsmtp1.idcloudhosting.com

5) Make sure all configurations use SSL/TLS as follows:

6) After that Done