MailGuard 365 – Enhanced Email Security for Microsoft 365 Plan 1 (1-100 users) Monthly
MailGuard 365 Plan 1, enhanced email security for Microsoft 365
MailGuard 365 is made by MailGuard Pty Limited, not by Microsoft, and it is an additional filtering layer rather than a replacement for the one already in the tenant. The vendor describes activation as a single Microsoft sign in with no MX or DNS changes and no separate console, and positions the product as complementing Microsoft Defender and Microsoft Sentinel. Because mail routing is unchanged, Exchange Online Protection continues to handle the mail path and any Defender for Office 365 licence stays in place and stays on the bill. The catalogue carries four plan tiers set by user count, each sold monthly or annually. This page covers Plan 1, the band for 1 to 100 users.
What it is
A third party email security product that layers on top of Microsoft 365 rather than sitting in front of it. The vendor describes it as working inside Microsoft 365 and complementing Defender and Sentinel.
Who makes it
MailGuard Pty Limited. Microsoft's marketplace lists that company as the publisher and Pax8 carries a MailGuard 365 vendor page under the same name. It is not a Microsoft product, although it is transacted on the Microsoft commerce rail, which is why a third party product can appear under Microsoft in a partner catalogue.
How it deploys, and why that matters commercially
The vendor states that activation uses a Microsoft sign in, with no MX or DNS changes and no extra console.
That mechanism has a consequence worth being explicit about. Because mail routing is unchanged, messages still arrive through Microsoft's own path, so Exchange Online Protection continues to do its work and any Defender for Office 365 licence continues to be needed and billed. This is a layer added to the stack. It does not remove a line from the existing licence position, and a business case that assumes it does is wrong before it starts.
That is also the argument in its favour: nothing has to be unpicked to trial it, and nothing breaks if it is switched off. Confirm the claim against your own configuration during a trial, particularly if a gateway already sits in front of the tenant.
The tier structure
Four tiers, set by number of users rather than by feature set, each available monthly or annually.
- Plan 1, 1 to 100 users
- Plan 2, 101 to 2,000 users
- Plan 3, 2,001 to 10,000 users
- Plan 4, 10,000 users and above
Because the band follows headcount, the tier changes as an organisation grows rather than as its requirements change. Plan 4 addresses organisations well outside the range this practice serves.
What this page deliberately does not repeat
The vendor publishes comparative detection speed figures against Microsoft's native controls. We have not measured them, we have no way to verify them, and we do not restate them here.
Evaluate on a trial against your own mail flow and your own volumes, and compare what it catches against what your existing Defender licence already caught. That comparison is the only one that settles the purchase, and it is one you can run yourself.
Is this a Microsoft product?
No. MailGuard 365 is made by MailGuard Pty Limited, and Microsoft's marketplace lists that company as the publisher. It is transacted on the Microsoft commerce rail, which is why it can appear under Microsoft in a partner catalogue.
Does it replace Microsoft Defender for Office 365?
No. The vendor positions it as working inside Microsoft 365 alongside Defender and Sentinel. Because activation changes no MX or DNS records, mail continues to flow through Microsoft's own filtering, so nothing is removed from the existing licence position.
Which tier applies to us?
The tier follows user count. Plan 1 covers 1 to 100 users, Plan 2 covers 101 to 2,000, Plan 3 covers 2,001 to 10,000, and Plan 4 covers 10,000 and above. Each tier is sold monthly or annually.
Do we need to change our mail routing?
The vendor states that activation uses a Microsoft sign in with no MX or DNS changes and no separate console. Confirm that against your own configuration during a trial, particularly if a gateway already sits in front of the tenant.
How much faster is it than Microsoft's own filtering?
The vendor publishes comparative detection figures. We have not measured them and do not repeat them here. Test against your own mail flow before deciding, and compare what it catches against what your existing Defender licence already caught.
- Vendor
- MailGuard
- Category
- Security
- Type
- SaaS
- Billing
- Monthly
- Commitment
- Monthly
- Available terms
- Monthly
- Unit price
- €1.70 /mo
- SKU
- MST-MLG-100-C100
- 1You prepay through ITSailor (Malta). VAT handled, reverse-charge for valid EU VAT IDs.
- 2We provision through Pax8 wholesale into your Microsoft tenant, with no third-party MSP markup.
- 3You keep the tenant. Sovereign by default: every engagement closes with an Exit Kit.
Pax8 wholesale, margin in the price
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