Dropbox or other file hosting services support for attachments
Recently (and less recently) companies like Mozilla and Yahoo has added third party support for attachments handling. So in Thunderbird you can use Box or YouSendIt and with Yahoo you now have Dropbox support.
If we could have such a support for MDaemon we could solve the disk wasting problem, due to growing need of large attachments that today is a common issue.
Currently MDaemon offers the attachment linking feature, but that is not very useful to solve or reduce this problem.
Thank you for sharing your idea with us. Integration with DropBox has been added to MDaemon.