My little writing on colocation
Not only are the inbound messages being scanned by Barracuda firewall, but so are your outbound messages, ensuring that everyone you do business with are protected as well. Barracuda firewalls make less stress for you and ensure more security for your technology. You do not need to alter your email server or your business to be protected by Barracuda firewall. Compatible with any email server and up to 100,000 accounts Barracuda firewall has an adaptability that makes it useful for a variety of businesses. For large companies you can utilize more then one barracuda firewall to ensure that all of your technology is protected.