The Spam Box folder is called “spam”
(or “.spam” with a dot) and is only created for an address when suspected spam is received by SpamAssassin.
Here’s 2 ways to check the spam folder:
Email Software: You can check and clear the spam folder through your email software. Login using the username (for example): firstname.lastname@example.org/spam with your email account password and all other settings the same as your main OLI email account.
Webmail: Log into “SquirrelMail” within the Webmail System BUT BE SURE to use this link and DO NOT login to webmail from cPanel as that will not access your proper account. See if the Spam folder appears on the left, if so, click it to check the messages. If the spam folder is not there or it is empty, click the “Folders” link at the top, below on that screen you should see the spam folder appear in box under the “Unsubscribe/Subscribe’ section. Click on the spam folder and which should appear on the right and click “Subscribe.” Then you should see it appear in the folders list on the left where you can click it to check messages.
It’s important to clear the Spam folder so your account quota is not used up. You can delete all mail in the Spam folder either through your email software or web mail that can access the spam folder, or to clear all the suspected spam for the entire domain that is in the Spam Box, log into cPanel and Click on “SpamAssassin” in the Mail section, then click the button that says “Clear Spam Box.”