- Currently, you can use MP4, WMV and MOV files for your video uploads. Also, you can always upload a YouTube link. 

- We accept most popular image file formats for the backgrounds and headers of your templates. We let you make it your own. 

- As far as file attachment goes, any type of file you can attach to an email can also be attached to a MeshMail. Although, MeshMail allows larger file sizes than typical email sends.