It is simple. Download with previews is really helping , 5 GB are sent without charge

I have been using JUMBOmail for many months, and now I can say I really love it! As a Graphic Designer, I send large files every day for my client, and this service makes my work much easier. I can put a price for downloading files and limit the number of downloads that is very convenient and safe for my customers and me. Besides, JUMBOmail has very easy and clear functionality with many other useful features, so I will totally recommend it to my friends and co-workers!

you dont have to be a scientist to use it, just enter the mail address and upload the file