tested on v520b2:
- create a gift certificate, with recipient email
- activate certificate and click on "send email"
- 2 emails are sent to recipient: expected one (you've received a gift) and sender's one (your gift have been sent)
Maybe it's time to explain in details how it works, because I wonder why we can't set gift's sender email, and I'd like to know if gifts could be bought directly from front, as a product.