Can I test SmtpClient before calling client.Send()?

Question

This is related to a question I asked the other day on how to send email.

My new, related question is this... what if the user of my application is behind a firew

Answer 1

I also had this need.

Here's the library I made (it send a HELO and checks for a 200, 220 or 250):

using SMTPConnectionTest;

if (SMTPConnection.Ok("myhost", 25))
{
   // Ready to go
}

if (SMTPConnectionTester.Ok()) // Reads settings from  in .config
{
    // Ready to go
}