Pros

Cons

• This solution provides a high degree of redundancy, meaning that if one server malfunctions the others can act as a backup.

• Increased expenses due to the need for more bandwidth, hardware, and software licensing
• High initial expense for specialized hardware that will eventually become obsolete
• Product-specific expertise required from network administrator or MSP
• Maximum effectiveness may require a recurring subscription for software, firmware, support, or filter definition sets
• Utilizes much more bandwidth locally in contrast to external solutions
• A power outage or failure of your Internet connection will cause messages to be bounced back to the sender.