Do you have a integration test for your send mail code?

DotNetOpenMailProvider provider = new DotNetOpenMailProvider();
NameValueCollection configValue = new NameValueCollection();
configValue["smtpServer"] = "127.0.0.1";
configValue["port"] = "8081";
provider.Initialize("providerTest", configValue);
TestSmtpServer receivingServer = new TestSmtpServer();
try
{
 receivingServer.Start("127.0.0.1", 8081);
 provider.Send("[email protected]",
 "[email protected]",
 "Subject to nothing",
 "Mr. Watson. Come here. I need you.");
}
finally
{
 receivingServer.Stop();
}
// So Did It Work?
Assert.AreEqual(1, receivingServer.Inbox.Count);
ReceivedEmailMessage received = receivingServer.Inbox[0];
Assert.AreEqual("[email protected]", received.ToAddress.Email);