Hey All - Would love some advice. We are a public community - meaning anyone can join and participate in our main forum. 

Last month (July), I had 50 accounts join the community that were spam. Those 50 accounts were able to post 16 replies/topics that were spam. 

I know there’s some risk in having a public community, but what should I check here? Are there some additional steps I should make sure we’re doing to catch these - to stop from joining or catch the posts? Several made it past the spam filter even though they included spam links.

Spam prevention is enabled. 

I mark topics/replies as spam in the mod console.