Integration with Cisco makes it a much better product. It is particularly helpful in keeping internal networks secure and prevents outside intruders from gaining access to confidential information using spam, virus, other types of malware to break into the firewall or IDS. Snort is helpful for real-time packet analysis. ClamAV is good for virus protection. Review collected by and hosted on G2.com.
High cost. It is not 100% effective. Some of the spam still makes it to the inbox. Cheaper alternatives are available if company is small. Review collected by and hosted on G2.com.