I can't send files by mail using the right click menu because the "Mail Recipient" item is never available. I don't if this information is needed, but I have Icedove (Thunderbird in Debian) set as my preferred mail application.
Fixed in master: commit 7e66ce644c174daaec597fb3da16b676f6db679d Author: Jannis Pohlmann <jannis@xfce.org> Date: Tue Nov 9 21:47:56 2010 +0100 Fix missing instruction to load the sendto model (bug #6762). Apparently, I forgot to add the call to thunar_sendto_model() load back again when I rewrote the sendto model based on GIO.