On second thought, I’m probably better off using IMAP for that synch up of my notes folder and GReader. If you use SMTP, you need a mail relay. I pay Mailhop $20/year for 200 outbound e-mails/day. Still, when developing and debugging it’d probably be easy to screw things up, chew through that quota, and end up looking like a spammer.
Better to come off looking like a busted e-mail client than looking like a spammer.