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