Very well thought out addon which integrates smoothly with Thunderbird. Makes sending large attachments a breeze.You no longer need to pay cloud storage fees
Also has a very nice web interface which has a Grants feature This allows you to send a key to someone else which gives them a link to send you a large file.If you need to move large files over the Internet, this add-on is as good as it gets
.My hosting company was willing and able to install this for me.
This review is for a previous version of the add-on (0.11).