Enhancements to the standard IBM Lotus Notes 6.5/7.0/8.x mail template.
It looks like R5 action bar rather than 6.5 :-P
Does the OpenNTF ME Template have this design element? Maybe this is a residual design element from a different Template?
… i conclude you upgraded your client from R5 to R6 ;). Replace design on your smtp.boxand it should change.