I was unable to locate this topic in the help index,but if you hit the ESC key
while downloading files you have the option to stop immediately or stop when
the current operation is done. I was trying to determine if they define the
current operation as the full mail download or the current message download. It
would be nice to get an answer to that. Either way you can stop the process
immediately and it you don't get all of the current message you'll get it next
time you go to download. In this way you can listen and when you've downloaded
a nice managible hundred messages or so, you can deal with them and then go
check for more mail and download another hundred. The actual number of messages
your system will hold obviously depends on where you are putting them and what
else is already there. But if you don't want to download 700 messages at a time
you don't have to as I understand it.