SMTP troubles in Evloution

[Mike McMullin]

  While my POP3 works fine for sending e-mail my smtp no longer works in 
Evolution (hence k-mail  :(  )  I keep getting a plain authorization error, my 
e-mail server ppl (not my ISP ppl)  tell my I need to adjust the settings to 
out.mnsi.net:587, that's not working, and I'm not sure why I can tenet into 
the e-mail server on that port, or even send stuff through KMail  (which I want 
to get away from, all of my data is in Evo.).  Any ideas or pointers?