The main benefit that I am getting from this solution is that it filters almost 95% of my spam mail. 

• Spam Scoring, with Block or Quarantine actions
• IP Address Filtering
• Sender Domain Filtering
• Sender Email Address Filtering
• Recipient Filtering
• Content Filtering (Subject, Header and Body)
• Attachment Filtering
• Fingerprint Analysis
• Image Analysis
• Intent Analysis

Our most of communication tool was email. phishing mail was the biggest headache for me. So I decided to go with Barracuda email security gateway

Now, our infrastructure is safer, and as an IT person, I feel relaxed.

The fact that the product monitors and rates incoming emails is valuable to me. It puts a score against them. If an email has a score we aren’t comfortable with, it'll automatically quarantine or block it. It also does geo-location-based policies that block email from certain countries like Russia, Turkey, Iran, Iraq, and China. It is mostly based on the data the tool collects around the world from its customers.

The most valuable feature of Barracuda Email Threat Scanner is the security it provides by delaying the delivery of suspicious emails until they can be reviewed inside the Barracuda control panel. It keeps the mail inside the system unless it is deemed okay, and then can be sent to the client.