We have used Trend Micro in the past. They are both good solutions. We moved from the appliance to the cloud. That was when we moved to Symantec. 

Most of our customers already migrated to ING online protection after considering the consolidation request, the cost of the product, and what they're spending month to month. 

We were using Kaspersky before. Then, we switched to Symantec. Now, we have switched to Trend Micro because Symantec utilizes a lot of memory.

We're moving over to Microsoft Defender P2.

I'm on a project now, however, the hardware's old as we bought it originally back when you bought the appliance from Symantec. Due to the fact that the hardware's old, and since the company's already paying for Microsoft, we've decided to just go full-on with the Defender P2 license, and pull that old hardware, and take the Symantec Messaging Gateway out. The goal is to get everything into the cloud. 

This is the only email security product that we have used.

I also use McAfee, however, McAfee not working at 100%. Symantec has gone back to 99.9%. Everyone says "our product is at 100%", however, it is not possible. That's due to the fact that everyday hackers are busy finding new ways to breach security. 

I like both solutions. I've used them both for the last few years.

It was ten years ago, and I was at a different organization, however, I do recall that we used Fortigate at that time.

I also currently use Symantec's Mail Security for Exchange. I use that for my emails alongside the Messaging Gateway.

We did not use other messaging security software prior to this solution.

I have used Sophos Email other than Symantec Messaging Gateway.