1. Login to webmail of the specific email account.
2. Go to SquirrelMail >> Folders >> Unsubscribe/Subscribe
3. Select spam from the list
4. Click on Subscribe.
5. Now refresh the page and go back to inbox.
6. You can see the 'spam' mail box listed on the left side of the page.
7. Click on 'spam' to view the messages in the spam box.