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Advanced Email Security
As the top attack vector, email demands the strongest possible protection. We block the most dangerous email-borne attacks, from phishing and ransomware to BEC, social engineering, payment fraud, and impersonation. Mimecast Email security: work protected
Reviews (338)
Jissel Q.
Essential Email Security with Seamless Outlook Integration
Reviewed on Apr 29, 2026
Review provided by G2
What do you like best about the product?
I like the ease of use of Mimecast Advanced Email Security and how well it integrates with Outlook. Having a tool that makes security easy and can be used with our other software is essential. The initial setup was also easy.
What do you dislike about the product?
It may block emails I expect to receive, but I prefer it this way for security.
What problems is the product solving and how is that benefiting you?
I use Mimecast Advanced Email Security for secure inbox monitoring and training. It filters security threats and integrates with Outlook easily, making security management simple and effective.
Jaylen J.
Highly Effective Spam Email Targeting
Reviewed on Apr 21, 2026
Review provided by G2
What do you like best about the product?
the ability to target emails that are spam
What do you dislike about the product?
sometimes it doesnt get all the spam emails
What problems is the product solving and how is that benefiting you?
incoming traffic management
Tristan R.
Reliable, Intuitive Spam Filtering with Strong Weblink Protection
Reviewed on Apr 07, 2026
Review provided by G2
What do you like best about the product?
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.
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.
What do you dislike about the product?
One downside is the time it takes to receive security codes for weblinks.
What problems is the product solving and how is that benefiting you?
Mimecast keeps up with the bots and scammers by outsmarting them. It has helped protect me from phishing attempts, and it saves me time by filtering out spam.
Jeremy A.
Great Configurability, Needs Better API Integration
Reviewed on Mar 17, 2026
Review provided by G2
What do you like best about the product?
My favorite thing about Mimecast Advanced Email Security is the relationship with our CSR, Brett Lenzi, who always jumps into support tickets, escalates them, and is a constant good-will advocate for us. I like how rules are easily configurable and the platform is always coming out with improvements. I appreciate the creation of custom rules to block new phishing patterns or suspicious domains and the ability to fine-tune filtering based on our specific environment, like by department. The intuitive rule building interface allows me to quickly make adjustments, and I find it valuable that we're continually working to reduce false positives via allow-lists and block-lists.
What do you dislike about the product?
We really need an API solution - we are missing out on connecting some services due to lack of API integration - MX records are really a legacy method. Limited automation capabilities - we can't programmatically pull email security metrics into our centralized security dashboards or SIEM platforms. Manual reporting processes - security incident data has to be manually exported rather than automatically fed into IR workflows. Disconnected threat intel - can't easily correlate Mimecast threat data with other security tools to get a full picture of attack campaigns. User provisioning inefficiencies - onboarding new employees or managing departing staff, we have to manually update policies rather than integrating with our identity management system via M365. The mx record approach limited my ability to create the interconnected security ecosystem that modern organizations need. API connectivity would broaden the efficacy of the overall impact of email security within the security stack.
What problems is the product solving and how is that benefiting you?
I use Mimecast Advanced Email Security to secure our email operations. It allows me to create custom rules to block phishing patterns and fine-tune filtering for our specific environment, reducing false positives. The intuitive rule-building interface lets me make quick adjustments.
Aaron V.
Customizable Email Security Policies That Protect Against Many Threats
Reviewed on Feb 04, 2026
Review provided by G2
What do you like best about the product?
It offers a wide range of email security policies with a strong level of customization. We’re able to protect our environment against many different types of threats, including dangerous malware, phishing attacks, impersonation attacks, and more.
What do you dislike about the product?
The interface isn’t very intuitive, and it can be a bit difficult to navigate through all of the policies and find exactly what I need. Customer support has been hit or miss as well. Sometimes I get good support, but other times it’s been difficult and lengthy to get my issues resolved.
What problems is the product solving and how is that benefiting you?
It solves my email security needs. I require a strong security platform to protect me from spam and phishing attacks, and this helps with that.
reviewer2500197
Email security has protected critical communication but hyperlink handling still needs improvement
Reviewed on Jan 21, 2026
Review from a verified AWS customer
What is our primary use case?
Securing the mail communication.
How has it helped my organization?
Biggest benefit would be filtering everything that is either spam or a threat before reaching users mailboxes.
What is most valuable?
Filtering from threats before emails are reached mailboxes.
URL protection and sandboxing. Potentially dangerous links are open in Sandbox rather than in user's web browser further helping with potential threats.
What needs improvement?
Allow modification of potentially dangerous hyperlinks to be converted into either text or image instead of rejecting the message.
For how long have I used the solution?
I have been dealing with Mimecast Web Security for more than five years.
What do I think about the stability of the solution?
Relatively stable with minimum issues. However, there were a few in the past caused a lot of headache.
What do I think about the scalability of the solution?
From what I've seen from the MSP, it seems quite complicated to manage the configuration itself, but since I am not using the product as an admin, I can't answer it definitively.
How are customer service and support?
I have not dealt directly with Mimecast Web Security's technical support; whenever we have a problem or something needs to be changed, I reach out to my MSP.
What about the implementation team?
I did not purchase Mimecast Web Security through the AWS Marketplace because it goes through my MSP.
What was our ROI?
In general, I can't comment on ROI with Mimecast Web Security since I never worked without mail security application. I can't quantify the time I would need to spend on fixing issues or dealing with threats without Mimecast.
What's my experience with pricing, setup cost, and licensing?
MSP in charge for setup etc. Costing seems similar to other evaluated solutions.
Which other solutions did I evaluate?
Mimecast was chosen by MSP who is also providing full support for us with the product. However, we as a company are evaluating various solutions which can provide better value to us either directly or indirectly via MSP. Mimecast seems to be heavy on configuration rather than using a user behaviour compared to alternatives we were presented.
What other advice do I have?
We have been using Mimecast Web Security for quite a lot of years. Regarding the analytics part you asked and what metrics are most valuable for monitoring web activities in our case, we am not dealing with the monitoring; that's our MSP who does the majority of the monitoring on our behalf.
Regarding the reporting part, I have seen the original reports from Mimecast Web Security, which seem to be quite heavy in terms of information. With the MSP, we are just reviewing and discussing what is necessary. If there is a concern, that is dealt with MSP immediately rather than waiting for formal conversations. However, I think the Mimecast report is fine and easy to read.
It is hard for me to say whether the installation is easy or complex, as I wasn't involved; it was done by our MSP. I am the end customer of Mimecast Web Security, not a consultant.
KishoreSugumar
Email security has protected data and now simplifies archiving and prevention workflows
Reviewed on Dec 19, 2025
Review provided by PeerSpot
What is our primary use case?
I have been working with Mimecast Email Security.
What is most valuable?
The functionality, including email archiving and data loss prevention features, is adequate. Mimecast Email Security offers certain features inherent to the product which are beneficial. In case of additional needs, I explore further customization.
What needs improvement?
There is room for improvement since new threats are emerging. Considering the availability of new features would be worthwhile. Mimecast Email Security is somewhat expensive compared to the competition in the Indian market, and the local presence is lacking as they do not have a local representative currently.
For how long have I used the solution?
I have been working with Mimecast Email Security for approximately seven months.
What do I think about the stability of the solution?
Currently, I am not facing any issues with Mimecast Email Security. If something comes up, I will be keen on exploring other products.
What other advice do I have?
I have been satisfied with Mimecast Email Security as a good solution. However, if I need anything additional, I will surely explore what can be done on that. I would rate this product nine out of ten.
Which deployment model are you using for this solution?
On-premises
If public cloud, private cloud, or hybrid cloud, which cloud provider do you use?
Amazon Web Services (AWS)
Ajay S.
Robust Email Security Made Simple and Effective
Reviewed on Dec 16, 2025
Review provided by G2
What do you like best about the product?
Mimecast Advanced Email Security stands out for its strong protection against phishing, malware and impersonation attacks while remaining easy to manage. The interface is intuitive, making daily monitoring, policy updates and threat investigation straightforward even for small security teams.
Implementation is smooth and well-documented, with minimal disruption to existing mail flow. Integration with M465 is seamless and features like URL protection, attachment sandboxing and impersonation protection work effectively out of box.
Implementation is smooth and well-documented, with minimal disruption to existing mail flow. Integration with M465 is seamless and features like URL protection, attachment sandboxing and impersonation protection work effectively out of box.
What do you dislike about the product?
Mimecast Advanced Email Security is a powerful platform, the interface can feel complex at times, especially for new administrators. Some settings are deeply nested, which can make advanced policy tuning and troubleshooting less intuitive.
What problems is the product solving and how is that benefiting you?
Mimecast Advanced Email Security addresses critical email-based threats such as phishing, spear- phishing, malware, ransomware and business email compromise. By providing advanced threat detection, URL and attachment analysis and impersonation protection, it significantly reduces the risk of users falling victim to malicious emails.
Akhil M.
Effortless Spam Blocking and Enhanced Email Security
Reviewed on Dec 10, 2025
Review provided by G2
What do you like best about the product?
it easy to identify unknown email and block spam and avoid breach
What do you dislike about the product?
sometimes it block genuine user and take time
What problems is the product solving and how is that benefiting you?
it easy to identify unknown email and block spam and avoid breach data leak
inayat S.
AI-Powered Security with Outstanding Threat Protection
Reviewed on Nov 21, 2025
Review provided by G2
What do you like best about the product?
AI-Powered, Multi-Layer Detection
Strong Phishing / Impersonation Protection
Excellent Spam & Virus Defense
Deployment Flexibility
Integrated Platform
Strong Phishing / Impersonation Protection
Excellent Spam & Virus Defense
Deployment Flexibility
Integrated Platform
What do you dislike about the product?
Steep Learning Curve / Complexity
Aggressive Out-of-the-Box Settings / False Positives
Aggressive Out-of-the-Box Settings / False Positives
What problems is the product solving and how is that benefiting you?
Phishing & Spear-Phishing
Business Email Compromise (BEC)
Business Email Compromise (BEC)