On my first job (in the beginning of the millennium) there was a limit on files you could download, something around 5Mb. If you wanted to download something bigger, you had to ask sysadmins to do that and wait... That was really annoying. So I and my colleague end up writing a service, that could download a file to local storage and chop it into multiple 5Mb attachments and send multiple emails to requestor.

After some time the limit on single file was removed, but daily limit was set up to 100Mb. The trick is that POP3 traffic wasn't accountable, so we continued to use our "service".