N-able Mail Assure
Mail Assure is cloud email security, continuity and archiving — filtering both directions with threat data pooled across every customer, administered across all your client tenants from one console instead of thirty admin centres. And if your client already owns Defender for Office, we will say so.
Data residency & processing
An email archive is years of correspondence — contracts, HR matters, financial discussions, and personal data under the DPDP Act. N-able’s Bengaluru GCC (100+ staff, June 2026) is a fact about people, not about where mail rests. Establish the storage region for filtering and for the archive separately, since they need not be the same, plus the sub-processor list and — the one buyers forget — how you get archived mail back on termination, in what format and how fast.
On CERT-In: the 180-day ICT log duty applies to you as the regulated entity, not to N-able. CERT-In’s own FAQ permits storage outside India provided logs are producible to the authorities in reasonable time — but if you are IRDAI-regulated, the 2023 audit annexure asks as a plain yes/no whether ICT logs are stored in India, and that is where an offshore region actually costs you.
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How it’s rated
Full scoreboard ↓Quick answer
The N-able platform family
This page covers Mail Assure — email security and archiving. The rest of the portfolio:
Quick facts
30-second orientation- Product
- Mail Assure — cloud email security & archiving
- Vendor
- N-able (NYSE: NABL) — spun out of SolarWinds 2021
- The category
- Email security for MSPs and IT teams
- The mechanism
- Collective intelligence — threat data pooled across customers
- Strong against
- Volume attacks — prior sightings vaccinate everyone
- Less differentiating
- Targeted attacks with no prior sighting
- Also includes
- Continuity and long-term archiving
- The MSP reason
- One console across many client tenants
- Ask first
- What does M365 already give your clients?
- Not the deepest
- Proofpoint and Mimecast go further, and cost more
- Vs
- Proofpoint, Mimecast, Abnormal AI, Defender for Office
- In India via
- TechBag — scoping, licensing, local support, GST
Understand email security before you buy it
Most product pages skip this. We start here — so you buy a capability, not a buzzword.
What is Mail Assure?
Cloud email security, continuity and archiving for MSPs — filtering both directions using threat data pooled across the whole customer base, administered across every client tenant from one console.
Native filtering alone vs a dedicated layer — the honest table
What consolidation actually replaces, dimension by dimension.
| Dimension | Native filtering alone | Mail Assure (N-able) |
|---|---|---|
| Administration | Thirty Microsoft admin centres | One console, every tenant |
| Policy consistency | Drifts per tenant | Applied once |
| Quarantine review | Thirty logins | One place |
| Threat learning | Per tenant | Pooled across all customers |
| Outbound mail | Often unfiltered | Filtered — limits the spread |
| Platform outage | Total — nobody sends | Continuity keeps mail flowing |
| Retention | Tied to the mailbox | Independent of the platform |
| Targeted attacks | (varies) | The honest limit — no prior sighting |
Filtering both directions, continuity and archiving across every client tenant from one console — which for an MSP is frequently the whole business case. Honest limits: pooled intelligence is fast against volume attacks and has NO prior sighting to learn from on a targeted one; this is not the deepest email product on the market; and if your client already owns Defender for Office 365 in a higher M365 tier, configuring that may be the right answer. We will tell you when it is.
The five pieces of the platform
Vendors love diagrams; buyers need to know what they’re actually operating. Here’s the whole platform, demystified.
Collective Intelligence
Threat data from every customer informs filtering for all, so a campaign seen once protects the rest within minutes; less useful against one-off targeted mail.
Inbound And Outbound
Outbound mail is filtered too, limiting how far a compromised account can spread convincing mail to a client’s customers and partners.
Continuity
If the mail platform goes down, people can still send and receive through the filtering layer, turning a total outage into degraded service.
Long-Term Archiving
Archiving keeps retention independent of the mail platform, meeting regulatory and contract obligations that outlive a deleted mailbox or a departed employee.
One Console, Many Tenants
Filtering, continuity and archiving run across every client from one console, not tenant by tenant in each Microsoft admin centre; often the real reason to buy.
One filtering layer for every client’s mail — inbound, outbound, continuity and archiving from a single console.
Twelve capabilities. Filter, keep flowing, retain.
Mail Assure filters inbound and outbound mail using intelligence pooled across every customer, keeps mail flowing during an outage and archives it independently — the email layer of the N-able portfolio.
Inbound Mail Filtering
Spam, malware and phishing filtered before delivery using threat data pooled across all customers; strong against volume attacks.
Pooled Threat Data
A campaign seen against one customer improves filtering for the rest within minutes; less effective against one-off targeted mail.
Outbound Mail Filtering
Outbound mail is filtered too, limiting how far a compromised account travels and protecting your client’s reputation.
Quarantine & End-User Control
Quarantine with end-user digests lets people release their own false positives instead of raising a ticket for each one.
Email Continuity
Send and receive through the filtering layer when the mail platform is down, so an outage is degraded service, not total.
Long-Term Archiving
Retention independent of the mail platform survives mailbox deletion and staff departures, meeting regulatory and contract needs.
Archive Search & eDiscovery
Search the archive when legal, regulatory or HR needs a message; an archive you cannot search quickly is a liability.
Many Client Tenants, One Console
Administer filtering, continuity and archiving for every client from one place, not each client’s Microsoft admin centre.
Filtering Independent Of The Mailbox
Filtering comes from a different vendor than the mail platform, so a gap or failure in one is not automatically in the other.
Reporting Per Client
Per-client reports show what was filtered, held and delivered, the evidence that justifies the line on the invoice.
Sits Beside The Rest Of N-able
Separate from the RMM platforms, Cove and the security line, but often bundled in one quote; price the whole basket.
Good, Not The Deepest
Proofpoint and Mimecast go further against targeted attacks, at a price; Abnormal AI is behavioural. Mail Assure is good and straightforward.
Watch the N-able platform in action
Email security, demonstrated.
Demo of N-able Vulnerability Management
The wider N-able platform Mail Assure sits within.
Linux Patch Management in N-central & N-sight
The RMM platforms this is commonly bought alongside.
Linux Patch Management in N-central
The larger of the two RMM platforms.
Want a live, India-context walkthrough for your environment?
Book a guided demo →The filter that came with the mailbox. Or a dedicated layer.
Here’s what genuinely sets it apart — starting with whether you need it at all.
Ask first whether you need a dedicated layer at all
Clients on Microsoft 365 already have Exchange Online Protection, and higher tiers add Defender for Office 365, often never configured. A dedicated layer earns its place for high-risk clients, for a second vendor in front of the mailbox, for independent archiving, or for one console across thirty client tenants.
Collective intelligence — what it is genuinely good at
Threat data is pooled across all customers, so a campaign seen against one informs filtering for the rest within minutes. That is strong against volume attacks, most of what arrives, but has nothing to learn from when a message is written for one client. Abnormal AI, Proofpoint and Mimecast invest in that targeted case.
Archiving is often the reason, and it is a good one
Retention obligations come from regulators, contracts and legal holds, and outlive a deleted mailbox or a migrated tenant. Mail Assure archives with retention independent of the mail platform, plus search and retrieval. It often closes the deal; test retrieval speed in the trial, because an archive you cannot search is a liability.
One console across thirty tenants — the real MSP argument
An MSP with thirty Microsoft 365 clients otherwise manages thirty admin centres: thirty quarantines, policy rollouts and report exports. Mail Assure runs filtering, continuity and archiving for every client from one console. The case weakens with few clients, and Microsoft’s own multi-tenant management may be enough.
The honest scope
Mail Assure offers pooled-intelligence filtering, continuity and searchable archiving across every client from one console. Proofpoint and Mimecast go deeper against targeted attacks, Abnormal AI is behavioural, and Defender for Office 365 may suffice. Pricing is quote-only; get the data region in writing for the DPDP Act.
The numbers behind the platform
What your Mail Assure evaluation looks like
Audit what your clients already own
Check each client’s M365 tier: if Defender for Office 365 is already included, configuring it may be the honest answer.
Trial on a real client tenant
Run thirty days on a real tenant, checking false positives, quarantine handling and whether users can release their own mail.
Test retrieval, and test outbound
Time a real archive search for old messages, then confirm outbound filtering is configured, which inbound-focused trials skip.
Report the value, per client
Send each client a monthly filtering report so renewal isn’t questioned; set retention against real obligations, in INR with GST.
The review scoreboard
Modelled on Gartner Peer Insights structure. *Counts and breakdowns are illustrative pending verified review collection.
Quick poll — what’s driving your evaluation?
Talk to an advisor“Thirty clients meant thirty Microsoft admin centres. One console across all of them was the business case and paid for itself.”
“Archiving closed the deal, not filtering. Our client’s regulator wanted evidenced retention, and mailbox retention wasn’t it.”
“During a platform outage, our client kept sending mail through continuity. That is what they remember about us.”
“For our law-firm client we moved to a product built for targeted attacks: pooled intelligence can’t learn when you’re the only target.”
“TechBag checked our clients’ M365 licences first. Two already owned Defender for Office and had never turned it on properly.”
“Test archive retrieval, not just retention. The requirement is always ‘produce these by Friday’. We ran a real search in the trial.”
“Outbound filtering is what people forget. A compromised client account mailing their customers is a reputational problem too.”
“An email archive holds years of personal data. We got the storage region in writing, and our regulated client later asked.”
Where everyone sits — the grids
Analyst firms bury this view behind paywalls, and review-site grids score satisfaction, not fit for your estate. So here’s TechBag’s synthesis of the email security market — tap any vendor to see why it sits where it does.
TechBag Email Security Grid
Execution strength vs product vision — the classic market map, minus the paywall.
MSP-oriented filtering and archiving. This page's product.
Email Detection × Multi-Tenant Admin
The grid nobody publishes — how strong the detection is vs how well it fits an MSP practice.
Good and straightforward; strongest on multi-tenant admin.
Positions are TechBag’s illustrative synthesis of public review-platform data and vendor documentation — not a reproduction of any analyst graphic. Verify before relying on it.
Mail Assure vs the email-security field
Proofpoint, Mimecast, Abnormal AI, Defender for Office and Sophos Email — honest lanes. The edge here is multi-tenant administration and included archiving. Facing genuinely targeted attacks? Proofpoint or Abnormal go deeper, and we sell them.
| Dimension | Mail Assure | Proofpoint | Mimecast | Abnormal AI | Defender for Office | Sophos Email |
|---|---|---|---|---|---|---|
| Position | MSP-oriented filtering + archiving | The enterprise depth leader | Deep filtering + archiving | Behavioural, targeted-attack focused | Native, in higher M365 tiers | Email inside a security portfolio |
| Volume-attack filtering | Strong — pooled intelligence | Strong | Strong | Strong | Competent | Strong |
| Targeted-attack detection | The honest limit — no prior sighting | Deep investment here | Strong | Behavioural — built for exactly this | Better at higher tiers | Strong |
| Archiving included | Yes — platform-independent | Separate | Yes — a core strength | No | Via M365 retention | Separate |
| Multi-tenant MSP console | Yes — the real business case | Enterprise-leaning | Enterprise-leaning | Improving | Via partner tooling | Yes (Sophos Central) |
| Continuity | Yes | Available | Yes — well regarded | No | No | Available |
| Best fit | MSPs wanting filtering + archiving across many tenants | Enterprises facing sophisticated targeted attack | When archiving depth is the requirement | When targeted attack is THE threat | When the client already owns a higher M365 tier | Inside a Sophos security portfolio |
Which approach fits you?
Honest fit signals — because the fastest way to lose your trust is to pretend one product wins every scenario.
Choose Mail Assure if…
- ✓You are an MSP administering email security across many client tenants and want ONE console instead of thirty admin centres
- ✓You need archiving with retention independent of the mail platform — often the requirement that actually drives the purchase
- ✓You want continuity so a platform outage is degraded rather than total
- ✓Your clients' realistic threat is volume attacks, where pooled intelligence works fast and well
Proofpoint or Mimecast if…
- ✓Your client is a plausible target for a bespoke attack — legal, financial services, anyone handling large payments. Deeper here, and priced accordingly
Abnormal AI if…
- ✓Targeted attack is THE threat — a behavioural approach that is strong precisely where collective intelligence has nothing to learn from
Nothing at all if…
- ✓Your client already owns Defender for Office 365 in a higher M365 tier and has never configured it. Check what they have before selling them anything — we will tell you when that is the answer
N-able Mail Assure is one of 36 email security products TechBag carries. The Email Security guide narrows them to a shortlist and shows the reasoning. →
What does tenant-by-tenant email admin cost you?
Drag the sliders (client-tenant count; IT hourly cost as a loaded rate). Estimates contrast administering email security tenant by tenant — quarantine checked in each, policy applied repeatedly, reporting exported separately — against one console across all of them, plus the outage time continuity converts from total to degraded. NB: this models ADMINISTRATIVE saving, not detection difference. If your client faces targeted attack, a deeper product is worth its price and this model does not capture that. Illustrative.
Loaded cost = salary + overheads per productive hour. Illustrative only — your TechBag quote models your actual environment and modules.
Three ways to consume it
Quote-only, and a SEPARATE product from the N-central and N-sight RMM platforms, Cove and the security line — commonly bundled into one quote, so price the whole basket rather than the line. What to establish beyond the number: whether archiving is included or an add-on and how retention beyond the standard window is charged; how continuity is priced; and per-seat versus per-domain counting across your client base. Check first whether your client's existing M365 tier already includes Defender for Office — sometimes the honest answer is to configure what they own. TechBag obtains the quote and invoices in INR with GST.
Mail Assure
Best across many client tenants
- QUOTE-ONLY — no published rate card
- Filtering (both directions), continuity AND archiving in one product
- One console across every client — often the real business case
+ Platform add-ons
Best for a broader rollout
- Scoped to your estate
- Add-on modules as needed
- Phased, right-sized deployment
+ check what they own first
Best before you sell anything
- Higher M365 tiers already include Defender for Office 365
- Many clients own capable filtering and have never configured it
- TechBag audits the licences before recommending a layer
Buy it for less — TechBag pricing beats list
Whatever the list prices above, TechBag negotiates a significantly better deal — with GST-compliant INR invoicing and local support. Ask us for your discounted quote.
Get an India-ready quote
Tell us your requirements and current tools — we’ll model it against what you spend today.
The 8 questions to ask every vendor
Take this into your next vendor call — including ours.
Which M365 tier is each client on, and does it already include Defender for Office 365?
Does your client face volume attacks, or targeted ones where pooled intelligence has no prior sighting to learn from?
Did you run a real archive search and time it? The requirement is producing messages, not storing them.
Is outbound filtering configured, so a compromised client account can’t mail their own customers unchecked?
Can end users release their own false positives, or does each one become a support ticket?
How many client tenants would this consolidate, and what is that administrative saving worth against the licence?
What retention do regulation and client contracts actually require, given mailbox retention is not an archive?
An email archive is years of correspondence including personal data under the DPDP Act. Have you got the storage region in writing?
Questions buyers ask
Ready to find out which clients actually need this?
Start with the licence audit — which M365 tier is each client on, and do they already own Defender for Office 365? Then trial Mail Assure on a real tenant, run a genuine archive retrieval, and confirm outbound filtering is configured. Or let a TechBag advisor run that audit and scope it honestly against Proofpoint, Mimecast and Abnormal, which we also sell.
Stats, ratings, review counts and pricing are illustrative and sourced from public materials; verify before purchase.