Digitally sign your email with DKIM (DomainKeys Identified Mail) and help prevent email spoofing on your side. DKIM adds a private key which stays in your server and a public key that stays in your DNS record. The outgoing email header that you send gets encrypted and the recipient servers then retrieve the public key to decrypt the incoming headers and verify that the messages really comes from your domain and was not altered while it is on transit.
I keep on seeing a few multi-site Wordpress installation using a sub directory but a few have a multi-site using a subdomain. Firing up curiosity, I tried installing a one using subdomains instead.
This guide will teach you the easy way to do things using virtualmin.
Virtualmin is an advance, powerfull and flexible web hosting control panel for your Linux and UNIX system. It is the virtual host magement module of the well-known Open Source web-based server management system Webmin. With virtualmin, you can manage multiple virtual hosts, multiple virtual domains, mailboxes, database, applications and other stuff from its comprehensive and friendly web interface.
Virtualmin is a comprehensive and excellent replacement for your cPanel and Plesk control panels . Virtualmin offersr the same features that you can find from the two mentioned control panels such as account creation, domain management, dns management, MySQL management and much more. Virtualmin also offers a control panel for non-root users for management of their hosting account.