I say lock both sides into a small, 'interview' sized room until they reach a fair and amicable deal, and the mail starts flowing again.
And if they have to pee... well... I'm sure that'll serve as an effective motivator for them to get their shit together.
"War must be, while we defend our lives against a destroyer who would devour all; but I do not love the bright sword for its sharpness, nor the arrow for its swiftness, nor the warrior for his glory. I love only that which they defend: the city of the Men of Numenor, and I would have her loved for her memory, her ancientry, her beauty, and her present wisdom. Not feared, save as men may fear the dignity of a man, old and wise." - J.R.R. Tolkien