"I'd be happy to reply, but only if the discussion is on the $XXXXX mailing list so other people could benefit from the exchange. Unfortunately I don't have the time or wrist energy to write emails that benefit one person only."Is there a more friendly way to say this?
I'd ask for a URL to point people at but it seems despite what that URL says, the act of getting a URL shoved into your face as a reply would feel like http://justfuckinggoogleit.com/ or something.