Copy of sent email
US QuickBooks Premier : 2009: Manufacturing and Wholesale
How do I recover a copy of an email message sent with an invoice via email?
How do I recover a copy of an email message sent with an invoice via email?

I don't know how to recovery it, but you can ask to the person you sent the email if s/he can forward the email to you back. Next time you send a QB document by email, always send a cc or Bcc to you at the same time.