   detecting a smtp sever (C#)
  hello does anybody know any smtp servers that I can send a email straight through? I have  amde a program that sends a eil via smtp but there is a problem if i distrubute the program the only people who can use it would be the ppl who are on the same ISP as me. So how would I detect there default smtp server so I can send a email through it?(C#)Cheers,Rob 