ssmtp version: 2.62-2.2 When I upgraded from Etch to Lenny my outbound mail over some size (not huge, call it 500 bytes or so) started becoming corrupted with garbage. Calling ssmtp from mutt from the same user account doesn't seem to have the problem. Switching kmail to use smtp to send seems to have fixed the problem.
reassign 513178 ssmtp 2.62-2.2 thanks Reassigning since it looks like this is an ssmtp problem, and there are similar bug reports for ssmtp.