The XMLi5 Email

This thing is designed to be bulletproof.

• It uses percentages to ensure that the email is reasonably responsive without relying on hacks and unreliable tricks. Pixel widths are specified as inline-styles as a fallback just in case.

• It works without a DOCTYPE, and is supplied with the XHTML1 Transitional DOCTYPE for reliability between the few clients that don't strip the DOCTYPE.

• It uses only table,tr, td and br elements for layout, adjusted where necessary with align/valign attributes.

• Attributes like width, height, border etc. are specified and then respecified in inline-style attributes, ensuring that the styling information is communicated one way or the other.

• It's composed in polyglot HTML, enabling the document to be transmitted as application/xml+xhtml with an amendment to the http-equiv meta tag specifying the MIME type.

• It's valid XHTML_{1.0 Transitional}!