Loaf of bread.

July1962

I emailed Hovis complimenting them on their range (I really do enjoy their granary bread).

A week later I received a voucher for one free bread product (no prizes for guessing what loaf I got).

http://www.hovisbakery.co.uk

anotherdaywasted

Did you have to give them your address in the email or did they email a voucher to you?

I'd feel weird saying 'Hi, I like your bread.... by the way this is my address, not that I'm hinting anything but... there it is....'

July1962

I put my postal address in the email.
It's what we'd have done in the old days when writing a letter, so I don't think that companies would find it weird to see an address in an email (it actually makes the writer look more legitimate in my opinion).
Hope that helps :-)