Spamassassin: How do you "report email as Spam"

[bmadams]

Hello and thanks,
I am trying to support a customer that uses Bluehost for their web hosting and e-mail.
They have been geting spam so I turned on Spamassassin
I access their e-mail accounts thru Horde

I have enabled Spamassassin; it is working; ie for e-mail accounts that are getting Spam, it created a Spam box and is moving most of the spam into this box...but,

It misses some, I want to flag those as spam ("report as Spam") so, going forward, they will automatically get moved to the Spam folder..

Also, I want to flag any valid e-mails that have been moved to the Spam box so they stop going there.

I cannot find how this is done, certainly it is an option?
I do see how to 'Move' or 'Copy' the e-mails from one folder to another...is this all I have to do then it will remember going forward?

I have searched the web and all I find is posting that talk about writing script...

Help

Brian