The most appropriate scenarios to implement email security is in companies that want to protect the use of electronic mail since it is one of the security breaches that are currently used to perform any type of attack. Very effective integration with Office 365 and it is highly recommended to add the functionality of advanced malware protection
Comparable to a Barracuda email appliance, these units retain email that is quarantined as well as provide cloud layer to support it. It is best suited for a medium size company as the devices are often not as scalable as Barracuda.
Filtering system is very strong, more often than not blocks bad email.
Does fine job filtering and configuring content filtering for extension types such as ZIP or RAR.
Intermediary between Internet and email system provides extra layer of security including ability to spool email in the event of an email system outage.
Outbound encryption feature is very useful for security purposes.
Cisco TAC support is very good since they have engineers available 24 hours a day, 365 days a year. Important to mention that you must have the support of the solution enabled to be able to receive a response from TAC and that we can be taken care of. The only drawback may be that they will not be able to see settings of the email provider you use.
Cisco was at least better than or equal to the others but within our budget. It provided all of the services of anti-spam, content filtering, anti-virus, DLP, encrypted email service, scalability, and more than the others. Cisco name and reputation were also key in our decision.
The end-of-life of appliances is unfortunate as it forces a purchase of a replacement unit. Barracuda devices have a 4-year refresh cycle so purchasing additional hardware is rarely necessary.
McAfee seems to be phasing out the service over time.