We send a lot of mail for Basecamp, Highrise, Backpack, and Campfire (and some for Sortfolio, the Jobs Board, Writeboard, and Tadalist). One of the most frequently asked questions we get is about how we handle mail delivery and ensure that emails are making it to people’s inboxes.

You Can't Kick Me Off Facebook, I Quit! by Richard Whittle: http://bit.ly/btkVW9