I'm not sure what to put -- I use Google Apps's "catch-all" feature for my domain, so I have it as paypal@example.com (I also do this for most sites requiring r

I'm not sure what to put -- I use Google Apps's "catch-all" feature for my domain, so I have it as paypal@example.com (I also do this for most sites requiring registration, e.g., HN is hn@example.com). While it does end up at the same inbox in the same domain, it's not quite my primary email.