You can send a variety of different kinds of files as attachments to Windows Mail messages. You can attach a spreadsheet when you're e‑mailing someone about financial issues, for example, or a photo you want to share with family members.
Open Windows Mail by clicking the Start button , clicking All Programs, and then clicking Windows Mail.
Click the File menu, and then click New Mail Message to open a new message composition window.
Click the Insert menu, and then click the Attach button.
In the Insert Attachment dialog box, click the file you want to attach to the message, and then click Attach.
The file is now attached to your message and appears in the Attach box in the message header.
When you are finished composing your message, click the Send button.
Although Windows Mail will allow you to attach a file of any type, for security reasons many e‑mail programs (including Windows Mail) prevent recipients from opening executable file attachments, such as those with .exe, .bat, and .inf file name extensions.