On a Mac client running Outlook 2011 connected to an Exchange 2010 server: all of a sudden, characters are getting dropped in outbound e-mail messages. The client machine has been rebooted and this is still recurring with every message sent.

Does anyone have any idea what would cause this? Feels like a throwback to BBS days.

Test message as appears in Sent Items, and as received by addressees:

![enter image description here](https://i.stack.imgur.com/CIOkS.png)

Screenshot taken prior to clicking Send:

![enter image description here](https://i.stack.imgur.com/NTJxj.png)