I'm happy to pass your request on! In the meanwhile, I know a lot of folks will use the "schedule" option to to schedule the send for 5-10 minutes later. Once a mailing is sent out, it's not possible to get it back, so a "recall" isn't really something that could be accomplished.
If you've seen a "recall" option in certain mail systems, they are only available internally for that domain (i.e. internal sends to the company) and not from a wide audience.