How to install and run Citadel, the combined SMTP/POP3/IMAP server on your Linode.
Citadel is a groupware suite that provides system administrators with an easy method to set up and manage email, calendars, mailing lists and other collaboration tools. It also features an automated installation process and versatile deployment options that allow the application to be scaled across multiple servers.
Setting up an email and groupware server using Citadel on an Ubuntu 14.04 LTS (Truly Tahr) Linode VPS.
