I am having trouble with how an inline attachment is supposed to work since it doesn't seem to be creating a boundary with Content-Type: multipart/related around the attachment, it merely relies on the outer multipart/mixed boundary defined in the header of the email. The effect is that my email client (Thunderbird) is treating the image as an attachment and is not placing it inline. ... | <m:attachment | value="#{emailService.params.get('img_logo')}" | fileName="logo.gif" | status="logo" | disposition="inline" /> | <img src="cid:#{logo.contentId}" alt="logo" /> | ... (the attachment value references a java.net.URL - i doubt this matters, but just in case) everything else appears to be correct: - the header for the logo: Content-Type: image/gif; charset=ISO-8859-1; name=logo.gif | Content-Transfer-Encoding: base64 | Content-ID: <ckgkyystehilrvoyfavc> | Content-Disposition: inline; filename=logo.gif - the corresponding img tag: <img src="cid:ckgkyystehilrvoyfavc" alt="logo" /> is this incorrect? perhaps i have misconfigured something? jboss-4.2.1.GA jboss-seam-2.0.0.CR3 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4100391#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...