If you accidentally deleted your email, you can still recover it if you have the option to recover it in the Trash. This can be done through your Gmail account. When you open Gmail, you will be able to see the deleted email in the Trash box. However, you can only retrieve a deleted email in Gmail , if you have an account with Google. It will be in the trash.

See also - emailspedia.com/how-to-recover-deleted-emails-in-outlook/