Hi,

 I have enabled the smtp server on my WinXP box, which allows me to send
emails from my pc using SmtpMail.Send.  I have written a little program for
a couple of friends (there ip address is dynamic) which gets their ip
address and then emails that address to me.  This address is used so that I
can help them via PC Anywhere when they have problems.  Their pcs will be
setup so that their smtp server is set to my ip which allows them to send
emails via my pc.  The trouble is that I do not understand how to
authenticate them using a username and password.  How would I send a user
name and password to my smtp server so that they can send email through my
server.  Here is some code if it helps..

Thanks in advance.

John

CODE:

// get the mail server address

IPHostEntry ipEntry2=Dns.Resolve(Dns.Resolve(edMailServer.Text).HostName);
//the address of my smtp server

IPAddress [] ipAddr2 = ipEntry2.AddressList;

// first get this pcs IP addresses

IPHostEntry ipEntry=Dns.Resolve(Dns.Resolve("localhost").HostName);  // get
pcs ips

IPAddress [] ipAddr = ipEntry.AddressList;

// now send an email to polomint77@hotmail.com

try

{

// Construct a new mail message and fill it with information from the form

MailMessage aMessage = new MailMessage();

aMessage.From = "IP SENDER";

aMessage.To = edEmailTo.Text;

aMessage.Subject = "IP Request accepted and logged";

// create the ip list

string cs = "";

for (int i = 0; i < ipAddr.Length; i++)

{

cs += ipAddr[i].ToString();

cs += " : ";

}

aMessage.Body = cs;  // got all ips in a string

// Now send the message

SmtpMail.SmtpServer=ipAddr[0].ToString();

SmtpMail.Send(aMessage);  // but cannot send coz I need username and
password to authenticate the user

}

catch(Exception ex)

{

MessageBox.Show(ex.Message);

}