sendmail delay

nbecker> I noticed recently that when I use mail-send (C-c C-c in mail) I nbecker> often see a considerable delay until xemacs will again respond to nbecker> me (busy cursor is displayed for many seconds). I notice that nbecker> mail-interactive is nil. nbecker> It may be that this became try when I upgraded(?) to xemacs-21.0b61. nbecker> It may also be that is when I upgraded to exim-2.05 (from exim-1.90). nbecker> Anyone else see this? Does exim's sendmail emulation support -odb (for background delivery)?