How long will my spam emails stay in the Spam folder?

How long will my spam emails stay in the Spam folder?

The emails in Spam folders are retained for a fixed period of time after which they are permanently deleted. By default, the emails that are older than (or received before) 30 days will be automatically cleared periodically. You can configure this buffer time according to your convenience. 
  1. Login to Zoho Mail .
  2. Click the Settings icon.
  3. Open the System settings card.
  4. Navigate to the Junk Cleanup Interval section.
  5. Next to Spam and Trash folders will be cleaned up based on the interval specified here , enter the desired value from 5 to 180 days.