Only one file can be uploaded per file attachment field

The following file formats are Supported:

.pdf, .xls, .xlsx, .doc, .docx, .zip, .ppt, .pptx, .psd, .txt, .xml, .mp3, .ttf, .otf, .woff, .eot, .svg, .odt, .ott, .js, .css, .png, .jpg, .gif, .jpeg, .rar in addition to all video file formats.