Email security that layers on top of Microsoft 365 for Australian businesses.
Microsoft 365's built-in email security (Exchange Online Protection, and Defender for Office 365 where licensed) is a reasonable baseline, but it's a one-size-fits-all default tuned for Microsoft's entire customer base — not for your business specifically. This page is about that choice: relying on the built-in filtering alone, versus adding a managed layer on top of it. You keep Microsoft 365 either way — Mail Shield sits in front of it and works alongside it, it does not replace it.
Why businesses look for a Microsoft 365 Built-in Email Security alternative.
- Phishing and impersonation emails that slip past default filtering
- No one actively tuning the built-in rules for your specific mail patterns
- Security alerts generated but nobody dedicated to reviewing them
- A generic, one-size-fits-all configuration rather than one tuned to your risk profile
- No direct engineer to call when a targeted phishing campaign gets through
Mail Shield — managed by engineers, not a helpdesk.
Mail Shield adds a managed layer in front of Microsoft 365 — you keep your existing M365 environment exactly as it is, and Edos engineers configure and tune additional filtering, monitor for threats getting through, and handle it directly when something needs attention. From AUD $25/user/month, no lock-in.
- Default filtering configuration, applied broadly across all Microsoft customers
- No dedicated person tuning rules for your specific business
- Alerts and reports that require someone to actively review them
- Support through Microsoft channels and documentation
- One layer of filtering, with no independent second check
- A managed layer configured and tuned specifically for your mail flow
- Edos engineers actively monitor and adjust filtering on an ongoing basis
- Alerts are reviewed and acted on for you, not left in a dashboard
- Direct engineer access, no support ticket queue
- Layered on top of Microsoft 365 — you keep your existing environment
Local engineers. Australian hosting. No offshore handoffs.
Edos Solutions is based in Sydney. Every engineer is Australian, all infrastructure is hosted in Australian data centres, and when you contact us you reach the person who actually manages your environment — not a helpdesk that escalates to someone who escalates to someone else.
For Australian businesses with data sovereignty requirements, privacy obligations under the Australian Privacy Act, or compliance frameworks that specify local data handling — this matters from day one.
Frequently asked questions
- Do we have to leave Microsoft 365 to use Mail Shield?
- No. You keep Microsoft 365 exactly as it is. Mail Shield is a managed layer that sits in front of your existing M365 environment — it is a complement to Microsoft 365, not a replacement for it.
- Isn't Microsoft's built-in email security enough on its own?
- For some businesses, yes. The built-in filtering is a genuine baseline. The gap is that it's a generic configuration applied the same way to every Microsoft 365 customer, with no one tuning it to your specific business or actively watching what gets through. Mail Shield adds that ongoing, managed attention on top of what Microsoft already provides.
- How does Mail Shield work alongside Microsoft 365 technically?
- Mail is routed through Mail Shield for filtering before it reaches your Microsoft 365 mailboxes, and outbound mail is checked before it leaves. Your mailboxes, licensing and Microsoft 365 admin setup are untouched — we add a layer, we do not migrate you off anything.
- What happens when a phishing email gets through despite Defender being enabled?
- That's exactly the scenario Mail Shield is meant to catch. We monitor filtering performance directly and adjust rules when something gets through, rather than leaving it to a dashboard nobody has time to check. You contact us directly and we investigate the same day.
Ready to switch? Start with a conversation.
Tell us what you're running now and what's not working. We'll tell you whether we're the right fit and what a transition would actually look like.
Australian businesses. Local engineers. No offshore subcontracting.