But my first reaction after reading it was actually, "Gee, my handwriting really is awful!" , followed by a re-read of how he had both interpreted and shared our communication exchange from earlier in the week.
Everything we do, say and write can come back to help us or to haunt us. Every element of our communication reflects and shapes who we are, and how others perceive us. This goes for communication outside your company – to customers, prospects, vendors and partners – as well as those you work with inside your organization.
It speaks to the importance of consistency and respect as much as anything.