Customer's site houses and owns all email server hardware components.

Customer's site houses and owns Microsoft Exchange server. Email is filtered through Barracuda Spam & Virus firewall owned and housed by Unique Computing.

Customer's site houses and owns their own Microsoft Exchange server and Barracuda Spam & Virus Firewall. In the event the customer's Barracuda fails, email is filtered through a backup Barracuda Spam & Virus firewall owned and housed by Unique Computing.