It's not like I'm against discussing proprietary software on *nix/BSD/whatever, I just wanted to point out how obviously and ridiculously at odds the board name is with the description.
I actually relied on hiri, a for-pay proprietary piece of software to get consistent exchange email working on *nix. Evolution was the next closest, and I used it if I were on a GTK desktop. But hiri saved my butt.
At the end of the day, I will use what gets the job done. I will always prefer it be FOSS, but I'm not going to gimp my workflow or waste my time if it doesn't fulfill my needs.