: At the end of the day, at a certain hour agreed upon by the remailer operators, : the remailer will split up its cached messages and split them among several

All sounds reasonble *except*... this is the internet, man! We can afford to do this once every 15 minutes, can't we?

That depends on whether or not you want to prevent spamming, and are willing to waste bandwidth. If you've got it, it's not a problem. If you're running your remailer on a system you don't own whose admins aren't going to be happy about the extra traffic, you won't.