Some attachments may be blocked.

Outlook lets you send any kind of attachment, but blocks potentially unsafe attachment files (including .bat, .exe, .vbs, and .js files) that can contain viruses from being received.

1. Open a new message window and click INSERT. 


2. In the Insert File dialog box that opens, navigate to the file you want to attach, select it, and click Insert. Select attachment. 

(optional) For image files (JPG, GIF, or PNG), selecting picture will make the image appear in the body of your message.


3. Select the file or files you want to attach to the message. 


You can also drag a file from your desktop or folder into the new message window. The file name will appear above the body of your message .

The maximum size of a message, including any attachments, is 25 megabytes. Encoding the attachment (making it part of the message) adds to its size, so if the total size of the attachments is almost 25 MB, they may be too large when encoded.