I say it should be ok, to send an email, wait for a month or so, and if no response and no login's in that time then the account gets canceled and names released... sorta like forums where 30 days with no login and the account is automatically canceled.
Not feasible, there is already a problem with DP mail going to spam/junk boxes.
Alright, but say for instance I get a message from any non-dplogin site, addressing my dplogin account, personally, I'm sure as hell ignoring it and flagging it as spam