kmail doesn't work after new update.

[Steven Vollom]

I updated Jaunty this morning on my new computer.  When I tried to post a 
question, I got an error message sending failed smtp.att.yahoo.com.  I tried 
my browser and it works fine.  I am not sure what these commands actually 
accomplish, however, they were not successful either:  kdesudo aptitude update 
and sudo dpkg --configure -a.  Suggestions please?

Steven