What's the URL of the page containing the problem?
n/a
What steps will reproduce the problem?

File a new ticket with a somewhat lengthy description.
Receive e-mail copy of the ticket.
Observe text is not wrapped and runs on far past the right edge of the screen.


What is the expected output? What do you see instead?
Wrapped text at a reasonable number of columns.
What operating system are you using? What browser?
Windows 7, Thunderbird 38.5.0

Please provide any additional information below.