--- title: Mimecast Advanced Email Security Reviews meta_title: 'Mimecast Advanced Email Security Reviews 2026: Details, Pricing, & Features | G2' meta_description: Filter 374 reviews by the users' company size, role or industry to find out how Mimecast Advanced Email Security works for a business like yours. aggregate_rating: rating_value: 4.4 review_count: 374 scale: '5' date_modified: '2026-10-24' parent_category: name: Email Security url: https://www.g2.com/categories/email-security ---

Mimecast Advanced Email Security Pros and Cons: Top 5 Advantages and Disadvantages

Quick AI Summary Based on G2 Reviews

Generated from real user reviews

Users value the advanced AI-driven threat protection of Mimecast, significantly enhancing email security and user awareness. (40 mentions)
Users find Mimecast exceptionally easy to implement and manage, appreciating its seamless integration and reliability for email security. (36 mentions)
Users commend Mimecast for its robust email security, effectively preventing spoofing and protecting against dangerous attachments. (28 mentions)
Users praise the powerful security features of Mimecast Advanced Email Security, enhancing protection and ease of use. (22 mentions)
Users appreciate the spam blocking capability of Mimecast, effectively preventing breaches and ensuring email security. (22 mentions)
Users note the complexity of Mimecast's interface, making it challenging for new administrators to fully utilize. (17 mentions)
Users face email filtering issues with Mimecast, struggling to locate emails and manage extensive policies effectively. (16 mentions)
Users often face email policy configuration issues, leading to time-consuming adjustments and frustrations with usability. (16 mentions)
Users find the false positives in Mimecast frustrating, as they can delay important communications and require manual intervention. (13 mentions)
Users report ineffective detection of legitimate emails, leading to disruptions and time-consuming manual interventions. (13 mentions)

5 Pros or Advantages of Mimecast Advanced Email Security

5 Cons or Disadvantages of Mimecast Advanced Email Security

Mimecast Advanced Email Security Reviews (374)

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Reviews

Mimecast Advanced Email Security Reviews (374)

View 3 Video Reviews
4.4
374 reviews
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Satyajit B.
SB
Satyajit B.
IT Support Engineer
Small-Business (50 or fewer emp.)
"Strong Email Protection with Powerful Investigation Tools"
4.5/5
What do you like best about Mimecast Advanced Email Security?

What I like most about Mimecast Advanced Email Security is that it gives you strong protection without making email support difficult. From an IT support point of view, the investigation tools are especially useful. If an email hasn’t arrived, I can look into what happened. Was it held? Blocked? Filtered for a reason? From there, I can take the right action and explain it clearly to the user. I also like that balance. You’re protecting people from threats like phishing, but you still need email to work smoothly day to day. Good security shouldn’t constantly get in the user’s way. Review collected by and hosted on G2.com.

What do you dislike about Mimecast Advanced Email Security?

Some admin tasks can feel unintuitive at first, and troubleshooting message delivery can sometimes involve checking several areas to find the cause as well as clunky UI. Review collected by and hosted on G2.com.

Elaina R.
ER
Elaina R.
English SCITT Teacher Trainee
Enterprise (> 1000 emp.)
"Highly Protective and Easy to Use, But Needs More Features"
5/5
What do you like best about Mimecast Advanced Email Security?

I like how Mimecast Advanced Email Security is very helpful and protective. It's also very easy to use, which means I'm able to get protected at all times and ensure anyone I recommend it to finds it useful and easy to use as well. Additionally, the initial setup was very easy. Review collected by and hosted on G2.com.

What do you dislike about Mimecast Advanced Email Security?

I felt that Mimecast Advanced Email Security was missing a variation of tools. I would appreciate additional features like extra detection for threats and scanning emails for potential attacks, which would enhance its overall capability and make it even more useful to me. Review collected by and hosted on G2.com.

VG
Vishnu G.
Cyber Security Associate
Mid-Market (51-1000 emp.)
"Effective Email Security with Room for Configuration Improvement"
4.5/5
What do you like best about Mimecast Advanced Email Security?

I like using Mimecast Advanced Email Security for both email security and email archiving. It effectively scans all emails, including attachments, which helps in blocking or holding emails with malicious links before they reach users, thereby protecting us from phishing attacks. I appreciate the option to release suspected emails blocked by Mimecast. During the initial setup, having vendor support made the configuration easy because they did all of it. Review collected by and hosted on G2.com.

What do you dislike about Mimecast Advanced Email Security?

I feel the configuration should be more user-friendly. It's a bit complicated to whitelist particular email accounts, like our GM or CEO. It's not easy to create rules for incoming and outgoing emails for individual users. There should be an option to whitelist users so that all outgoing for a particular user shouldn't be blocked, and emails from specific users should not be blocked for specified users. Review collected by and hosted on G2.com.

Jose Luis M.
JM
Jose Luis M.
Software Engineer
Small-Business (50 or fewer emp.)
"Effective Protection against Phishing in Microsoft 365"
5/5
What do you like best about Mimecast Advanced Email Security?

I use Mimecast Advanced Email Security daily at the company, and it really eliminates the problem of human error by blocking phishing attempts at the root before they reach the mail inbox, saving me hours of ticketing. I really like the peace of mind its real-time link analysis provides, as it stops fraudulent links and protects us against malicious modifications attackers might make after sending the email. The initial setup is also very simple and intuitive. Review collected by and hosted on G2.com.

What do you dislike about Mimecast Advanced Email Security?

I find the administration console unintuitive. Review collected by and hosted on G2.com.

Verified User in Information Services
GI
Verified User in Information Services
Mid-Market (51-1000 emp.)
"Robust Email Security with Comprehensive Filtering"
4.5/5
What do you like best about Mimecast Advanced Email Security?

I like how Mimecast Advanced Email Security effectively filters suspicious emails without needing much manual work. The threat detection and visibility are really useful for quickly checking and addressing potentially risky situations. I also appreciate the email filtering and threat detection because it catches a lot of suspicious messages and provides full visibility into what is being blocked. Additionally, attachment protection adds another layer of security, helping us handle suspicious links or files before they reach our users. Review collected by and hosted on G2.com.

What do you dislike about Mimecast Advanced Email Security?

The platform works well overall, but the admin interface can take time to become familiar with. Reporting could also be a little more flexible, especially when creating custom reports. I'd like to see a simpler admin interface with easier navigation. More customizable filters and report templates would make it easier to get the specific information we need. Review collected by and hosted on G2.com.

Verified User in Education Management
AE
Verified User in Education Management
Mid-Market (51-1000 emp.)
"AI reliably detects dangerous emails – flexible, simple, and fairly priced"
5/5
What do you like best about Mimecast Advanced Email Security?

The AI-powered detection of dangerous emails, and the simple and straightforward operation. Everything is adjustable and flexible. And the costs remain reasonable, it could be much more expensive. Review collected by and hosted on G2.com.

What do you dislike about Mimecast Advanced Email Security?

Initially, it wasn't easy to discern from the plans and the platform what the best solution for our company was. However, after applying our compliance requirements, it became feasible to choose the right product. Review collected by and hosted on G2.com.

TR
Tristan R.
Customer Service Manager
Small-Business (50 or fewer emp.)
"Reliable, Intuitive Spam Filtering with Strong Weblink Protection"
5/5
What do you like best about Mimecast Advanced Email Security?

I appreciate the intuitive spam filtering - this greatly reduces the junk mail in my inbox. The spam filter is reliable, and I receive a reminder email each day that I still have messages "on hold" in moderation.

I am glad there is an automated feature that allows me to block senders or domains, but also allows me to permit senders or domains. This is very helpful to reduce the time I spend moderating emails.

Another feature I really like is the protection with weblinks. The security with the weblinks also integrates with Teams, so I know I am covered in both Outlook and Teams. Review collected by and hosted on G2.com.

What do you dislike about Mimecast Advanced Email Security?

One downside is the time it takes to receive security codes for weblinks. Review collected by and hosted on G2.com.

Ambrish M.
AM
Ambrish M.
Network Security Engineer
Mid-Market (51-1000 emp.)
"Top-Tier Email Security That Keeps Corporate Inboxes Safe"
4.5/5
What do you like best about Mimecast Advanced Email Security?

It offers some of the best email security features in its segment, and it works very vigilantly by isolating malicious emails. I would recommend it for any corporate environment. Review collected by and hosted on G2.com.

What do you dislike about Mimecast Advanced Email Security?

There’s really nothing to dislike about it, but it does need improvement when it comes to false positives and reviewing the latest threats and malicious payloads in attachments. Review collected by and hosted on G2.com.

Verified User
G
Verified User
Enterprise (> 1000 emp.)
"Robust Data Protection with Easy Access to Emails"
4.5/5
What do you like best about Mimecast Advanced Email Security?

I appreciate how Mimecast Advanced Email Security protects sensitive client and customer data, including personal and financial information. Living in Germany, privacy is crucial, and this tool creates a safety bubble that relieves worries about identity theft and data breaches. It's highly effective at managing and separating personal data from company data, which is super helpful in preventing crimes. I am impressed by its protection from phishing attempts and its notifications that allow me to still read emails, so I don't miss important ones. Review collected by and hosted on G2.com.

What do you dislike about Mimecast Advanced Email Security?

Just the interface colors, I find boring. Review collected by and hosted on G2.com.

Verified User in Commercial Real Estate
EC
Verified User in Commercial Real Estate
Enterprise (> 1000 emp.)
"Mimecast Advanced Email Security: Effective Threat Blocking with AI Detection and DLP"
5/5
What do you like best about Mimecast Advanced Email Security?

What I like most about Mimecast Advanced Email Security are its effective threat blocking, useful IT investigation tools, AI-driven detection, seamless integration, and Data Leak Prevention (DLP). Review collected by and hosted on G2.com.

What do you dislike about Mimecast Advanced Email Security?

What I dislike about Mimecast Advanced Email Security is its complex, dated administrative interface, along with detection issues that can lead to false positives. There’s also a steep learning curve to effectively manage the extensive email policies, and the overall cost feels high. On top of that, I’ve run into gaps in the documentation, which makes administration and troubleshooting harder than it needs to be. Review collected by and hosted on G2.com.