The service prepares HTML-encoded email by embedding CSS styles before sending to recipients. It creates style attributes from linked CSS stylesheets, converts relative paths for links to absolute paths, and checks styles for compatibility with popular email clients. These checks and modifications help to promote consistent display of HTML email for recipients.
API methods support submission of components to be assembled, including URLs for the HTML and CSS source, base URL for link coversion, and query sting to be added to links for traffic analytics reporting. Methods also accept parameters to control the conversion process, then the API generates email files and provides links to the resulting HTML and plain text versions.