This is the {{Umbox}} ([U]ser talk page [m]essage [box]) metatemplate, for use with the likes of {{Talkback}} and {{You've got mail}}.
{{Umbox | image = image.svg | imagelink = [[WP:SANDBOX|page that the image should link to]] | text = This is a message. | style = <!-- This is optional; can be used to add or modify parameters -->. | class = Insert CSS class here }}
