See help page:
http://www.fastsecurecontactform.com/attachment-fields
Any file type can be uploaded depending on the settings you set.
Note: Maximum size is limited to available server resources and various PHP settings. Very few servers will accept more than 2mb. Sizes under 1mb will usually have best results. examples: 500kb, 800kb, 1mb, 1.5mb, 2mb Note: If you set the value higher than your server can handle, users will have problems uploading big files. The form can time out and may not even show an error.
The biggest obstacle to HTTP uploads is the fact that most broadband internet upload bandwidth is usually 10 times lower than the download bandwidth. This will easily cause server timeouts when trying to upload files bigger than 1-2M by HTTP. For this very reason, if you need to upload files bigger than 1-2M, you really need to use a FTP server or a file sharing service.
