The .EnableSSL property does not appear to be the same as the:
msg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpusessl", true);
setting that we had to use in .NET 1.1. EnableSSL seems to use the STARTTLS extension of SMTP (sometimes called Explicit SSL). Is there any way to use Implicit SSL (usually over port 465, sometimes called SMTPS), where the entire connection is wrapped in an SSL layer?