Barracuda fills in the gaps that Microsoft leaves wide open

It's a great platform, the only downside is a common one. It regularly encrypts emails that aren't sensitive, and you don't know until the person on the other end says something or you follow up and ask why they haven't responded. That's a bit of a pain sometimes.

I would definitely recommend it due to the decent pricing. I wish the MS built-in M365 tools were better, but Barracuda does a good job of taking their place. For industries that need DLP on their email, like healthcare, banking, and education, Barracuda provides a reliable product for a good cost. The additional services you get, malware/AV filtering, URL filtering, spam protection, business continuity, those are all icing on the cake. The only issues we've ever really had with them is that it will sometimes take a back/forth string of emails and decide randomly to encrypt it, so what was a flowing benign conversation is now locked behind a wall for recipients. As the sender, you have no idea when it's going to decide to do this and have to remember to tag emails with a decrypt tag long before it happens or face the consequences.