You can send as many files as you want to as many people as you want on a single e-mail.
Sending e-mails is simple. When you're doing it for the first time you will first need to configure the SMTP Client.
After you've done that you will only need to select on the 'File Lists' the file or files you want to e-mail, right-click on them and send them.
The popup menu that shows is identical to the 'File Menu' so you can use either one of them.
The files will be attached to the e-mail when you send it, but you can also send links to your files instead of having the files attached. Learn more about sending links to files.
After you click the send option of the menu then the E-mailer will assist you.