Accidentally deleted non-spam email in Spam folder. Not in Trash. How can I recover?

Accidentally deleted non-spam email in Spam folder. Not in Trash. How can I recover?

Hi,

I think the title says it all.

I accidentally hit the delete button on an email in my Spam folder. Not problem, went to Trash to restore it, but it's not there! How do I recover it?

Thanks.