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

1. Email Security

Users value the advanced AI-driven threat protection of Mimecast, significantly enhancing email security and user awareness.

See 40 mentions

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Vishnu G.

Mid-Market (51-1000 emp.)

4.5/5

"Effective Email Security with Room for Configuration Improvement"

What do you like 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, whi

Aaron V.

Mid-Market (51-1000 emp.)

3.5/5

"Customizable Email Security Policies That Protect Against Many Threats"

What do you like about Mimecast Advanced Email Security?

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 t

2. Ease of Use

Users find Mimecast exceptionally easy to implement and manage, appreciating its seamless integration and reliability for email security.

See 36 mentions

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Ajay S.

Mid-Market (51-1000 emp.)

4.5/5

"Robust Email Security Made Simple and Effective"

What do you like about Mimecast Advanced Email Security?

Mimecast Advanced Email Security stands out for its strong protection against phishing, malware and impersonation attacks while remaining easy to mana

Akhil M.

Mid-Market (51-1000 emp.)

5.0/5

"Effortless Spam Blocking and Enhanced Email Security"

What do you like about Mimecast Advanced Email Security?

it easy to identify unknown email and block spam and avoid breach

3. Security

Users commend Mimecast for its robust email security, effectively preventing spoofing and protecting against dangerous attachments.

See 28 mentions

See Related User Reviews

Aaron V.

Mid-Market (51-1000 emp.)

3.5/5

"Customizable Email Security Policies That Protect Against Many Threats"

What do you like about Mimecast Advanced Email Security?

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 t

Ajay S.

Mid-Market (51-1000 emp.)

4.5/5

"Robust Email Security Made Simple and Effective"

What do you like about Mimecast Advanced Email Security?

Mimecast Advanced Email Security stands out for its strong protection against phishing, malware and impersonation attacks while remaining easy to mana

4. Features

Users praise the powerful security features of Mimecast Advanced Email Security, enhancing protection and ease of use.

See 22 mentions

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Ajay S.

Mid-Market (51-1000 emp.)

4.5/5

"Robust Email Security Made Simple and Effective"

What do you like about Mimecast Advanced Email Security?

Mimecast Advanced Email Security stands out for its strong protection against phishing, malware and impersonation attacks while remaining easy to mana

Igor B.

Mid-Market (51-1000 emp.)

4.0/5

"Mimecast, a Great Mail security tool"

What do you like about Mimecast Advanced Email Security?

The features that stand out most are its Targeted Threat Protection, and the ease of use it provides. The TTP suite is excellent at neutralizing most

5. Spam Blocking

Users appreciate the spam blocking capability of Mimecast, effectively preventing breaches and ensuring email security.

See 22 mentions

See Related User Reviews

Ajay S.

Mid-Market (51-1000 emp.)

4.5/5

"Robust Email Security Made Simple and Effective"

What do you like about Mimecast Advanced Email Security?

Mimecast Advanced Email Security stands out for its strong protection against phishing, malware and impersonation attacks while remaining easy to mana

Akhil M.

Mid-Market (51-1000 emp.)

5.0/5

"Effortless Spam Blocking and Enhanced Email Security"

What do you like about Mimecast Advanced Email Security?

it easy to identify unknown email and block spam and avoid breach

5 Cons or Disadvantages of Mimecast Advanced Email Security

1. Complexity

Users note the complexity of Mimecast's interface, making it challenging for new administrators to fully utilize.

See 17 mentions

See Related User Reviews

Ajay S.

Mid-Market (51-1000 emp.)

4.5/5

"Robust Email Security Made Simple and Effective"

What do you dislike about Mimecast Advanced Email Security?

Mimecast Advanced Email Security is a powerful platform, the interface can feel complex at times, especially for new administrators. Some settings are

inayat S.

Enterprise (> 1000 emp.)

4.5/5

"AI-Powered Security with Outstanding Threat Protection"

What do you dislike about Mimecast Advanced Email Security?

Steep Learning Curve / Complexity Aggressive Out-of-the-Box Settings / False Positives

2. Email Filtering Issues

Users face email filtering issues with Mimecast, struggling to locate emails and manage extensive policies effectively.

See 16 mentions

See Related User Reviews

tali k.

Enterprise (> 1000 emp.)

5.0/5

"Consistent, Low-Noise Phishing Protection with Smart Features"

What do you dislike about Mimecast Advanced Email Security?

URL rewriting can break links, the admin UI/reporting feel clunky with limited customization, and quarantine workflows sometimes delay legitimate mail

Verified User

Mid-Market (51-1000 emp.)

3.5/5

"Mimecast is a defensive email application"

What do you dislike about Mimecast Advanced Email Security?

The fact that email security has to be put into policies and if policies are not properly done you can have serious issues!

3. Email Issues

Users often face email policy configuration issues, leading to time-consuming adjustments and frustrations with usability.

See 16 mentions

See Related User Reviews

tali k.

Enterprise (> 1000 emp.)

5.0/5

"Consistent, Low-Noise Phishing Protection with Smart Features"

What do you dislike about Mimecast Advanced Email Security?

URL rewriting can break links, the admin UI/reporting feel clunky with limited customization, and quarantine workflows sometimes delay legitimate mail

Verified User

Mid-Market (51-1000 emp.)

3.5/5

"Mimecast is a defensive email application"

What do you dislike about Mimecast Advanced Email Security?

The fact that email security has to be put into policies and if policies are not properly done you can have serious issues!

4. False Positives

Users find the false positives in Mimecast frustrating, as they can delay important communications and require manual intervention.

See 13 mentions

See Related User Reviews

Akhil M.

Mid-Market (51-1000 emp.)

5.0/5

"Effortless Spam Blocking and Enhanced Email Security"

What do you dislike about Mimecast Advanced Email Security?

sometimes it block genuine user and take time

inayat S.

Enterprise (> 1000 emp.)

4.5/5

"AI-Powered Security with Outstanding Threat Protection"

What do you dislike about Mimecast Advanced Email Security?

Steep Learning Curve / Complexity Aggressive Out-of-the-Box Settings / False Positives

5. Ineffective Detection

Users report ineffective detection of legitimate emails, leading to disruptions and time-consuming manual interventions.

See 13 mentions

See Related User Reviews

Akhil M.

Mid-Market (51-1000 emp.)

5.0/5

"Effortless Spam Blocking and Enhanced Email Security"

What do you dislike about Mimecast Advanced Email Security?

sometimes it block genuine user and take time

inayat S.

Enterprise (> 1000 emp.)

4.5/5

"AI-Powered Security with Outstanding Threat Protection"

What do you dislike about Mimecast Advanced Email Security?

Steep Learning Curve / Complexity Aggressive Out-of-the-Box Settings / False Positives

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aqib j.

IT Administrator

Mid-Market (51-1000 emp.)

7/7/2025

"Mimecast Advanced Email Security"

5/5

What do you like best about Mimecast Advanced Email Security?

It provides the best security features to handle internal and external emails. Review collected by and hosted on G2.com.

What do you dislike about Mimecast Advanced Email Security?

I don't think there is anything I dislike about this tool because it always helps us to increase security features. Review collected by and hosted on G2.com.

What problems is Mimecast Advanced Email Security solving and how is that benefiting you?

Protection against phishing and spear-phishing attacks: It blocks malicious emails and impersonation attempts, reducing the risk of credential theft and fraud.

Defense against malware and ransomware: It scans attachments and links to prevent harmful content from reaching users, protecting our systems and data.

Spam and graymail filtering: It ensures our mailboxes stay cleaner and employees remain productive by minimizing unwanted or irrelevant emails.

Data loss prevention: It helps enforce security policies to prevent sensitive information from being leaked or sent in error. Review collected by and hosted on G2.com.

Adam J.

Cyber Security Engineer

Mid-Market (51-1000 emp.)

2/14/2025

"Mimecast, the most favoured email gateway"

4.5/5

What do you like best about Mimecast Advanced Email Security?

The capabilities. There is a range of features including journaling, staff awareness and the obvious security features. The support team are really helpful and will conduct tenant reviews when requested, to ensure you are getting the most out of the product. There are a wealth of integrations which can be used also, which helps in automating some of the frequent manual tasks. The service itself is easy to implement and set up, for both on prem and cloud environments Review collected by and hosted on G2.com.

What do you dislike about Mimecast Advanced Email Security?

The product itself can be easy to use, although the settings can be a bit tedious to find, as they can often be found in multiple places Review collected by and hosted on G2.com.

Verified User in Electrical/Electronic Manufacturing

Enterprise (> 1000 emp.)

10/1/2025

"Great when we started with them, declined quickly after implementation"

1.5/5

What do you like best about Mimecast Advanced Email Security?

Included email signatures in their offering for free as well as the tabbed interface made switching between consoles very easy! Review collected by and hosted on G2.com.

What do you dislike about Mimecast Advanced Email Security?

The product was 'ok' but not the best at catching everything. The real reason for the decline was in support. Getting customer service on the phone during outages was horrible and took entirely too long in a SEV-A scenario. Review collected by and hosted on G2.com.

Andrew V.

IT Engineer

Small-Business (50 or fewer emp.)

6/17/2025

"Reliable email Security For modern Business"

3.5/5

What do you like best about Mimecast Advanced Email Security?

The use of Data Loss Prevention which prevents sensitive data leaks is one of the things I like about Mimecast. Mimecast integrates very well with Office365. Review collected by and hosted on G2.com.

What do you dislike about Mimecast Advanced Email Security?

The initial setup is a bit complex, things like Policies and connectors are a bit challenging to get right. Review collected by and hosted on G2.com.

Patrick L.

CIO

Mid-Market (51-1000 emp.)

6/30/2025

"Mimecast is awesome for email phishing/spam"

5/5

What do you like best about Mimecast Advanced Email Security?

How easy it is to find emails or block them Review collected by and hosted on G2.com.

What do you dislike about Mimecast Advanced Email Security?

If a emails gets rejected then we would have to allow them then have that user resend the email which can get annoying to the user side resending documents a couple times Review collected by and hosted on G2.com.

Sam D.

IT Support

Mid-Market (51-1000 emp.)

7/2/2025

"Mimecast our email buddy who doesn't miss"

5/5

What do you like best about Mimecast Advanced Email Security?

How many features you can reject/block an email address/domain Review collected by and hosted on G2.com.

What do you dislike about Mimecast Advanced Email Security?

Messages that are deferred/rejected need to be resent after allowing that email address/domain Review collected by and hosted on G2.com.

Verified User in Financial Services

Mid-Market (51-1000 emp.)

2/14/2025

"Strong Email Security, But Requires Some Fine-Tuning"

4/5

What do you like best about Mimecast Advanced Email Security?

Mimecast Advanced Email Security does a good job of blocking phishing, malware, and impersonation attacks before they reach your inbox. The impersonation protection helps catch CEO fraud and spoofed emails. Setup is straightforward, and once it's running, it mostly takes care of itself. The admin dashboard has a lot of options, which can feel a bit overwhelming at first, but it gets easier to navigate over time. It’s not perfect—false positives happen now and then—but overall, it’s a solid option for keeping email threats in check. Review collected by and hosted on G2.com.

What do you dislike about Mimecast Advanced Email Security?

One downside is that it can be a bit aggressive with filtering, leading to false positives that require manual review. The admin dashboard, while powerful, isn’t the most intuitive and takes some time to get used to. Review collected by and hosted on G2.com.

What problems is Mimecast Advanced Email Security solving and how is that benefiting you?

Mimecast Advanced Email Security helps block phishing attempts, malware, and impersonation attacks before they reach my users inbox, reducing the risk of security breaches. The URL and attachment scanning add an extra layer of protection against malicious links and files. It also cuts down on spam, which keeps my inbox cleaner and more manageable. Review collected by and hosted on G2.com.