Hi there, My mum and I have both recently got Kindle paperwhites and while I am able to convert epub books to mobi and email them to my Kindle, when I try to send them to my mum's, they just seem to get lost in the ether. I don't get a fail message, Calibre says it's doing the job but mum isn't seeing them turn up and when I look at her Amazon account I can see they aren't there at all. I've double checked the email address, I know the Kindle addresses are a bit weird but the one I'm using is correct. Any help would be much appreciated, we're going on holiday soon and mum needs some new books.