Sending large emails is sometimes necessary for some companies. Not everyone wants to use the web interface. It would be nice if you could set up local storage on the server that when an email is sent that exceeds a admin set specific size the email headers are scanned for attachments and automatically placed into storage and a link is inserted into the email suggesting the receiver DL the file by a certain amount of days, also set up by the admin, or the file would automatically be deleted. The attachment limits would be set to not exceed the senders MB limit.

The same could be used for receiving email.