Hi Everyone, i used this guide on order to built a mail server: http://www.krizna.com/ubuntu/setup-mail-server-ubuntu-14-04/ Now i have a few question please: 1)My actuall hostname is "armonico" and i want at the end to have a mail adress with different domain: tzuben.co.il, can i do it? mail server with differet name? 2)At the guide i stuck at the stage where i need to telnet "mail.tzuben.co.il" I cant find any help or guide, Please Help Me!! Thank You ALL!!!!