spamtrap and hamtrap - how can i send an email on this adresses in the right way?

Hello,

i have here an Ubuntu 16.04 with virtualmin. I enabled sieve and the spamtrap/hamtrap aliases. So when i get an spam in the inbox i click in my mailprogramm (kmail) on forward. The default is that the mail that i forward is attached, so i can also mark 10 spams , klick on forward, then this 10 spam are attached to the mail. Is this also possible learn the spamfilering? Or must i forward every mail inline to the spamtrap/hamtrap aliases.

thanks and best regards