I followed the 14.10.1 LTS setup and everything seems to be working just fine but I'm not sure about the e-mail part though. I haven't bought a domain yet as I want to learn to use ISPConfig 3 first but I'm unable to receive email to me mailboxes. I tried to create the domain "localhost" in ISPConfig but it's not considered valid. Then I decided just to make up a domain "test.com" and I edited /etc/hosts accordingly. Then I created two email accounts via ISPConfig "firstname.lastname@example.org & email@example.com". Using SquirrelMail I sent an email from one account to the other and didn't get any error but the latter account never received the email. What is the problem here? Is Postfix not referencing /etc/hosts and therefore doesn't know that the accounts and the domain are on my computer?