Gmail Trash and Spam Folders
General Information about deleting messages in Gmail
Email is permanently deleted 30 days from the day the message is put into the trash. This time period can not be changed. Trash and spam are on a continuous rolling basis of 30 days from the date the item is deleted or received as spam.
Quarantine summary reports are not available in Gmail. Check your SPAM label and move it to the top of your Gmail labels on the left panel.
Moving the Trash and Spam label
If you have many labels, you may need to scroll down to see the Trash. If you click on the "Trash" or "Spam" label and drag it to the region near the "Inbox" it should remain there.