First fallback to passed kw.

bt5/erp5_base/SkinTemplateItem/portal_skins/erp5_base/Entity_sendEmail.xml

@@ -60,7 +60,7 @@ sender = event.getSourceValue()\n
 if sender is not None:\n
   from_url = formataddr((sender.getTitle(), sender.getDefaultEmailText()))\n
 else:\n
-  from_url = portal.portal_preferences.getPreferredEventSenderEmail()\n
+  from_url = kw.get(\'from_url\', portal.portal_preferences.getPreferredEventSenderEmail())\n
 \n
 to_url = formataddr((context.getTitle(), context.getDefaultEmailText()))\n
 \n

bt5/erp5_base/bt/revision

-1018
\ No newline at end of file
+1019
\ No newline at end of file