G2

Shravankumar L.

Information security analyst

Mid-Market (51-1000 emp.)

9/18/2026

Business partner of the seller or seller's competitor, not included in G2 scores.

"Effective Threat Protection with a Learning Curve"

5/5

What do you like best about Mimecast Advanced Email Security?

One thing I have appreciated about Mimecast Advanced Email Security is how effectively it catches phishing and impersonation attempts it flags look-alike domains and spoofed sender names before they reach the inbox, often with a clear warning banner. The time of click URL protection is also a nice touch, since it re-checks links even after delivery, catching malicious sites that go live later. On the admin side, the dashboard gives good visibility into threat trends and blocked emails, which has been useful for our IT team.

It integrates smoothly with our existing email setup without much disruption. The one downside is that it occasionally flags legitimate emails as suspicious, so there's a bit of a learning curve in fine-tuning the filters, but overall it's been a reliable layer of protection. Review collected by and hosted on G2.com.

What do you dislike about Mimecast Advanced Email Security?

Honestly my biggest complaint is the admin dashboard, it's kind of a lot to take in at first. Took me a while to figure out where everything was instead of just clicking around trying to find stuff. It connected fine with our Microsoft 365 setup, but a couple of the settings weren't as easy to line up as I thought they'd be. Sometimes a normal email gets delayed a few minutes because it's scanning it, which is annoying if you're waiting on something important.

It also flags emails as suspicious sometimes when there's nothing actually wrong with them, and it's not always clear why it did that. Support was fine when I reached out, but the onboarding kind of assumes you already know a bit about email security, so it wasn't super beginner friendly at first. And it's on the pricier side compared to other options, so that's something to think about if budget is tight. Review collected by and hosted on G2.com.

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

Before we had Mimecast, the biggest headache was phishing and spoofed emails slipping through and landing in peoples inboxes, plus the constant risk of someone clicking a bad link or opening a malicious attachment without realizing it. Since setting it up, that risk has dropped a lot the AI-based detection catches impersonation attempts and weird sender patterns before they even reach us, and the link re-checking at click-time has genuinely stopped a few things that would've gotten through with older filters.

The UI is clean enough that our end users don't get confused by it, and the warning banners make it obvious when something looks off without being overly alarming. Integration wise it plugged into our existing Microsoft 365 setup pretty smoothly, so we didn't have to rebuild our whole email workflow around it.

Performance has been solid too, no noticeable delays for legitimate mail, which was a worry going in. Support during onboarding was responsive when we had setup questions, though the admin dashboard does take a little time to fully get comfortable with since there's a lot packed into it. On the pricing side, it's not the cheapest option out there, but given how much time it saves IT from chasing down phishing incidents and cleaning up after them, it's paid for itself in reduced headaches alone. Overall it's given us a lot more peace of mind around email as an attack vector, without adding a ton of extra friction for regular users. Review collected by and hosted on G2.com.