Avanan blocks phishing emails that other companies miss. I’ve tried several. And because Avanan is API based, it can reach into all mailboxes and remove emails that shouldn't be there.
Even though I use Mimecast as my primary filter, Mimecast misses many phishing and spam emails. Avanan detects the phish and stops it.
Avanan is also very quick acting to remove email from inboxes. Users will report, “I saw something suspicious but then it disappeared.” Avanan has done its job. Creating block rules against that sender is easy. Or, for example, if an email is sent by mistake then I can remove it from all mailboxes with a quick search.
Plus, it has anomaly detection. Meaning it sees the good and bad login attempts to our accounts and does a Geo-IP lookup and notifies me of suspicious behavior. For example, I have an email account that is accessed from different countries at the same time and Avanan detects and reports this. You can also create an exception rule to exclude it from future detections.
It's really a brilliant product and deserves recognition. I seriously sleep better now that I have Avanan.
Why do I use two email filters? Because two is better than one in today's environment. Review collected by and hosted on G2.com.