<%= image_tag attachments["logo.png"].url, alt: "OpenStreetMap", title: "OpenStreetMap", height: "30", width: "30", border: "0" %> <%# NB we need "text-decoration: none" twice: GMail only honours it on the but Outlook only on the %> OpenStreetMap
<%= raw style_message(yield) %>
<%= yield :footer %>

OpenStreetMap