No more typing reviews! Try our Samantha, our new voice AI agent.

Fortinet FortiMail vs Trend Micro Deep Discovery Email Inspector [EOL] comparison

Why PeerSpot?
 

Comparison Buyer's Guide

Executive SummaryUpdated on Feb 26, 2026

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Categories and Ranking

Fortinet FortiMail
Average Rating
8.6
Reviews Sentiment
6.8
Number of Reviews
68
Ranking in other categories
Email Security (6th)
Trend Micro Deep Discovery ...
Average Rating
8.0
Reviews Sentiment
7.1
Number of Reviews
8
Ranking in other categories
No ranking in other categories
 

Featured Reviews

Abhimanyu Das - PeerSpot reviewer
Senior Cybersecurity Engineer at Kyndryl
Targeted email filtering has reduced spam and phishing and now saves significant investigation time
The best features of Fortinet FortiMail include its techniques and tactics, which are highly effective compared to other solutions such as Microsoft 365. Although Fortinet FortiMail may not be as advanced in some aspects, it is well recognized for its strong performance in handling spam and phishing. It performs thorough mail scanning and also offers a sandboxing feature that enhances protection. Fortinet FortiMail has had a positive impact on my organization by significantly reducing unwanted email activities such as spam and phishing. It provides accurate detection and generates results that often exceed what can be achieved through manual analysis. Since deploying Fortinet FortiMail, I have observed a reduction in investigation time by at least 20 to 30 percent.
Bilal Saleem - PeerSpot reviewer
Manager Pre Sales NI at Nera Philippines Inc.
Reliability and threat intelligence make this solution competitive, but AI improvements can further enhance its effectiveness
The best features of Trend Micro Deep Discovery Email Inspector include its reliability. The second valuable feature is its built-in sandbox feature, allowing for inspection of incoming emails and attachments. The sandbox is an appliance that opens any attachment in an enclosed environment to assess its impact and potential for viruses. This protects the network from harmful threats. Trend Micro has a very large R&D team with excellent threat intel, allowing them to provide better solutions than some competitors. They understand emerging threats based on the information from their EDR. The key strengths can be summarized as reliability, a good integrated one-box solution that includes a sandbox, and their R&D capabilities and good ratings, which lead to better threat intelligence. The detailed threat intelligence provided by Trend Micro Deep Discovery Email Inspector is valuable in understanding the behavior and tactics of potential email threats.

Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Pros

"FortiMail has a low cost and high support."
"The solution is very, very stable."
"Fortinet FortiMail is a complete product addressing mail security concerns. It helps to know spam subscriptions and create restriction policies."
"As Fortinet FortiMail is a stable product that runs without big issues, it has a bigger chance of getting chosen by customers over its competitors, even if its price may be a little higher."
"FortiMail is an awesome product mechanically."
"The solution is very reliable and very stable."
"Fortinet FortiMail has a lot of valuable features. It works great. It also has an antivirus feature. Support for Fortinet FortiMail was also great when my team wanted to block some geographic IPs, but couldn't figure out how to do it. The support team provided clear communication on how to resolve that issue. Another valuable feature of Fortinet FortiMail is SPAM filtering which tells you how many spammy emails you've received. Based on my current use cases, I'm happy with Fortinet FortiMail."
"The important feature is the application control, which makes administration much easier. It also has an intrusion prevention feature. There's also the wireless functionality, which works well with Huawei devices."
"The most valuable feature of Trend Micro Deep Discovery Email Inspector is the simple analysis of phishing emails."
"I would rate the solution's stability at ten out of ten."
"The best features of Trend Micro Deep Discovery Email Inspector include its reliability."
"Trend Micro is a very good product."
"I like that it is very user-friendly and easy to install."
"I find Trend Micro to be a good solution for security purposes."
"It can effectively monitor outbound and inbound devices."
"I highly recommend Trend Micro Deep Discovery Email Inspector due to its security and scalability features."
 

Cons

"Fortinet FortiMail can be improved in terms of its dashboard, which is small and not visually appealing, making deeper investigations difficult."
"I don't know if it is possible, but I would like to see Artificial Intelligence and machine learning introduced."
"The solution is user-friendly to a degree but the dashboard needs improvement."
"Limited ability to upgrade hardware may lead to some performance issues that might otherwise be improved."
"Such kinds of things, raised from the point from the objective actually, we are using Fortinet FortiMail. We don't find any kinds of challenge or difficulties, but Fortinet FortiMail is more efficient and more effective for us. I don't know for other client, but for us, Fortinet FortiMail is very effective Like, for instance, if it is possible, let's say some kind of high threat is actually encountered if it could be possible to SMBs in our smartphone, or mobile apps, kinds of thing, if Fortinet FortiMail is available to monitor the thing using from our mobile phone from our smartphone. If such kinds of things are truly included, it will be more or good for us."
"I would like it if the solution could be more affordable."
"I believe there is room for enhancement in content and web security features."
"The security products stop their operations once the subscription period expires. It is a wrong policy. If I trust a product, it has to continue working even after expiry. It should have a grace period of 30, 40, or 60 days. We can extend the subscription during those days. In some places, subscription extensions can take up to six weeks. During the renewal process, the support offered by the company is very poor. It also reduces security. We pay for the expired period but do not get protection during those times. The user of Fortinet FortiMail should have a feature to see spam names."
"It could be more user-friendly, easier to install, and lighter on the network. I would say that for all products because you do not need technical expertise to take care of it. When you have a user-friendly solution, it makes it easier for the vendors or companies like us. We do not have to go to the client's site to attend to issues all the time. Because it is user-friendly, they can take care of it after some training."
"The tool needs to incorporate faster response times for issue detection, more detailed reports, and better compatibility with older operating systems (e.g., Windows 7, 8, Server 2012)."
"Trend Micro Deep Discovery Email Inspector could improve by making it easier to use. Microsoft solutions are easier to use."
"The dashboard could be improved to match the quality of Check Point Harmony's dashboard."
"Trend Micro's technical support has room for improvement. More efficient support should be provided, especially for standard support."
"I would like to be able to send emails to a specific sandbox. This is a feature I would like to see added to the next release."
"The product's feature for message processing and blocking devices for bulk emails needs improvement."
"To improve Trend Micro Deep Discovery Email Inspector, it should have updates with better AI and ML-based integration."
 

Pricing and Cost Advice

"We paid approximately $30,000 for the solution. It is less expensive than some other solutions. We have one license that carries all the features that we wanted."
"Compared to its competitors, Fortinet's products are available at a higher price range."
"In terms of licensing, we are using a virtual machine license for the single virtual server which it runs on. Doing it this way enables us to cut costs by only licensing FortiMail for our exact use case. If you need to expand in future, you can later buy extra licenses per virtual machine."
"There is either an annual or six-month charge to use this solution. Fortinet FortiMail is cheaper than Proofpoint or Cisco Security, or other email security appliances."
"You need to pay additional fees for premium support."
"It is an expensive product."
"There is a license required for this solution."
"Fortinet FortiMail is inexpensive."
"The price of Trend Micro Deep Discovery Email Inspector is less expensive than Microsoft solutions."
"It's an expensive solution, and you may not see a return on investment in a short period of time. However, you will see a return over a long period of time."
"The solution's pricing is high, and I would rate it an eight out of ten."
"We pay for an annual subscription for this email security solution."
report
Use our free recommendation engine to learn which Email Security solutions are best for your needs.
917,433 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Manufacturing Company
10%
Construction Company
8%
Financial Services Firm
8%
Outsourcing Company
7%
Performing Arts
12%
Outsourcing Company
11%
Construction Company
8%
Comms Service Provider
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business33
Midsize Enterprise23
Large Enterprise14
By reviewers
Company SizeCount
Small Business5
Midsize Enterprise2
Large Enterprise1
 

Questions from the Community

What needs improvement with Fortinet FortiMail?
I think they should improve Fortinet FortiMail on-premises by enhancing its user interface. Additional features they could have in the future would include advanced analytics capabilities. I do thi...
What is your primary use case for Fortinet FortiMail?
I do have a partnership with Fortinet. I have been both a partner and reseller.
What is your experience regarding pricing and costs for Trend Micro Deep Discovery Email Inspector?
On the pricing side, Trend Micro Deep Discovery Email Inspector is not the cheapest, but it's not the highest either. Its prices are around 80%, which is lesser than some vendors but higher than most.
What needs improvement with Trend Micro Deep Discovery Email Inspector?
To improve Trend Micro Deep Discovery Email Inspector, it should have updates with better AI and ML-based integration. While it has some capabilities in this area, focusing more on this aspect coul...
What is your primary use case for Trend Micro Deep Discovery Email Inspector?
The main use case for using Trend Micro Deep Discovery Email Inspector is for the anti-spam solution. Different enterprises get spam emails from multiple sources, so the use case for customers is t...
 

Also Known As

FortiMail
Deep Discovery Email Inspector
 

Overview

 

Sample Customers

Magromer Cueros y Pieles S.A.
Bank Saint Petersburg, CEITEC S.A., Dar Al-Handasah, Mitsubishi Electric Information Systems, Motilal Oswal Financial Services Ltd, OKWAVE, Oman Arab Bank, VakifBank
Find out what your peers are saying about Proofpoint, Microsoft, Check Point Software Technologies and others in Email Security. Updated: September 2026.
917,433 professionals have used our research since 2012.