What symbol is this?

NATEJOLLAY  It's not a good screenshot, but I think so- with a purple arrow.

This is a blown up version from my inbox - in the compact message list. 

Another blown up version of your icon and mine.  The thread expander tells me you're using the single line view... and (guessing here) you removed / rearranged some of the fields... If the field is narrow, the icon is cut off. 

Maybe its not signed, just cut off.... 

And for an addition to the "Outlook is nuts" list <g> ... if I move the icon field right, its just a simple reply arrow (if not signed - signed icon doesn't change).