For the best HTML e-mail delivery results, CSS should be inline. This is a huge pain and a simple newsletter becomes un-managable very quickly. This script is my solution.

• CSS styles are converted to inline style attributes

Checks style and link[rel=stylesheet] tags and preserves existing inline attributes

• Relative paths are converted to absolute paths

Checks links in href, src and CSS url('')

• CSS properties are checked against e-mail client capabilities

Based on the Email Standards Project’s guides

• A plain text version is created

Optional