Need an antispam filter for Exchange 2013 for 100 mailboxes?

Question

Microsoft Exchange

Now I use mail cleaner. It catches spam, but does not add addresses to the white list. You have to constantly monitor and send mail. Perhaps commercial solutions.

Answer 1

The built-in is good.

Answer 2

If paid solutions are possible, then there are many options: casper, eset, trendmicro, cisco, orf, etc., etc.
You can even watch cloudy ones!
The built-in is very limited, but they are built-in for that)
I would recommend putting antispam "before" Exchange and not "on" Exchange

Answer 3

As mentioned above, it is better to put an anti-spam filter in front of Exchange, it is still better than Kaspersky, since it recognizes Russian spam best of all.