Are your regular mails even moved to antispam folder ?
Please let me know the version of antispam (To find antispam version; open security center - click about)
Version 10.15, Build 10.15.106, Content Version 3435 and Engine Version 220.127.116.1125.
Only filtered emails for SPAM are moved to McAfee folder. Setting is Medium. Actually this appears to be related to Office 2007 because the option to Mark as Not Junk only becomes enabled on email residing in the default Junk E-mail foleder (which is not used by McAfee).
Open mcafee security center,
click email & im , click configure to the right pane
click advanced for email protection
Under filtering options check whether "put spam mails in this folder" is set to "Mcafee Antispam folder"
If not select that option , click apply and ok and check whether you still receive spam mails