Gmail users can now send up to 20MB of attachments to each other. But we want more! Here are 7 awesome services that let you send files of more than 500MB.One of the best known file delivery services, YouSendIt allows you to send up to a 100MB file without creating an account. Upon uploading a file to YouSendIt, an email is sent to the recipient, where they are given a link to download the file.