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Mimecast

www.mimecast.com · Mimecast · Last updated 03 Sept 2026
Email security Security awareness and phishing simulation
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Overview

Mimecast is an email security platform that filters phishing, malware and spoofed messages before they reach a mailbox, and separately offers email continuity, archiving and security awareness training as additional modules.

From the vendor

Mimecast is an email security platform that filters phishing, malware and spoofed messages before they reach a client's mailbox, and it also offers email continuity, so mail keeps flowing if the primary mail server is down, along with archiving and a security awareness training module. It suits MSPs serving clients in regulated industries where email archiving and continuity guarantees matter alongside filtering, and larger client organisations where a dedicated email security layer justifies the added cost over relying on Microsoft's or Google's built-in filtering alone. Smaller, less regulated clients may not need the full breadth of modules Mimecast offers.

Pricing is per mailbox per month, quoted through a Mimecast partner or reseller rather than published as a single list price, and it is usually bundled across whichever modules a given client needs rather than sold as separate standalone products with separate prices. Mimecast integrates with Microsoft 365 and Google Workspace as its two supported mail platforms, and with SIEM and SOAR tools for larger security operations that want Mimecast's alerts feeding into a broader security stack. An API is available for MSPs building automated provisioning across many client tenants, rather than adding and removing mailboxes by hand in each one. Before buying, confirm exactly which modules, filtering, continuity, archiving and security awareness training, are included in a given quote, since Mimecast bundles them selectively rather than as one fixed package, and check the archiving retention period matches any regulatory requirement the client actually has. It is also worth confirming how Mimecast's pricing changes as a client adds or removes mailboxes mid-contract, since some email security vendors true up seat counts only at renewal rather than continuously.

Our take

Mimecast suits MSPs with clients in regulated industries who need archiving and continuity guarantees on top of filtering, not just spam and phishing protection. It is a heavier, more expensive option than relying on Microsoft's or Google's own filtering, so it makes most sense where a client's compliance requirements or risk profile actually justify the extra layer. Confirm exactly which modules are included in a quote before assuming continuity or archiving are bundled with basic filtering. It is less suited to a small, unregulated client who is well served by their existing mail platform's built-in protection.

Pricing

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Features

Email security

Phishing and malware filtering yes
Spoofing and impersonation protection unknown
Email continuity yes
Archiving yes
Security awareness training bundle yes
API-based post-delivery scanning unknown
DMARC monitoring unknown
Attachment sandboxing unknown
Data loss prevention unknown
Email encryption unknown
Microsoft 365 integration yes
Self-service quarantine unknown

Security awareness and phishing simulation

Show all 24 features

Email security

Security awareness and phishing simulation

Phishing simulation campaigns unknown
Training content library unknown
Automated remediation training unknown
Phish-reporting button unknown
Multi-language content unknown
Compliance training modules unknown
Client-facing reporting unknown
Microsoft 365 and Google user sync unknown
Smishing and vishing simulation unknown
Gamification unknown
Campaign scheduling automation unknown
PSA integration for billing unknown

Support and training

Deployment cloud
Platforms web
HQ United Kingdom
Founded 2003

Alternatives in Email security

All Email security software
Avanan Check Point's API-based email security that sits inside Microsoft 365 or Google Workspace. No reviews yet Proofpoint Essentials Email security for small and mid-sized businesses from an enterprise security vendor. No reviews yet

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Mimecast vs AvananMimecast vs Proofpoint Essentials

FAQ

Is Mimecast cloud or on-premises?
Mimecast is available as cloud.
Does Mimecast keep email flowing if the primary mail server goes down?

Yes, email continuity is one of Mimecast's modules, designed to keep mail flowing if a client's primary Microsoft 365 or Google Workspace mail service is unavailable, rather than leaving users unable to send or receive email during an outage. It is a separate module from core filtering, so confirm it is included in a given quote rather than assuming it comes bundled by default.

Does Mimecast work with Google Workspace, or only Microsoft 365?

Mimecast supports both Microsoft 365 and Google Workspace as mail platforms, so an MSP does not need a separate email security product for clients split across the two. Confirm current feature parity between the two platforms for the specific modules being bought, since not every feature is guaranteed to behave identically on both.

Are archiving and security awareness training included with Mimecast's core filtering?

Not automatically. Mimecast bundles filtering, continuity, archiving and security awareness training selectively depending on what a client needs, rather than as one fixed package with everything included. An MSP should confirm exactly which modules are covered in a specific quote, since assuming archiving or training are included by default can lead to a client being under-provisioned.

Can an MSP automate mailbox provisioning across many Mimecast tenants?

Yes, Mimecast provides an API that MSPs can use to automate provisioning, such as adding or removing mailboxes, across many client tenants rather than making changes by hand in each one. This matters most to MSPs managing a larger number of Mimecast tenants where manual administration would otherwise be a significant recurring workload.

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