public void AddDkimHeader(System.Net.Mail.MailMessage message)
{
if (string.IsNullOrWhiteSpace(GlobalConfiguration.Configuration.DkimPrivateKey))
{
return;
}
if (message.From.Host != GlobalConfiguration.Configuration.DkimDomain)
{
return;
}
try
{
var privateKey = DKIM.PrivateKeySigner.Create(GlobalConfiguration.Configuration.DkimPrivateKey);
var headerToSign = new string[] { "From", "To", "Subject" };
var domainKeySigner = new DKIM.DomainKeySigner(privateKey,
GlobalConfiguration.Configuration.DkimDomain,
GlobalConfiguration.Configuration.DkimSelector,
headerToSign);
var dkimSigner = new DkimSigner(privateKey,
GlobalConfiguration.Configuration.DkimDomain,
GlobalConfiguration.Configuration.DkimSelector,
headerToSign);
message.DomainKeySign(domainKeySigner);
message.DkimSign(dkimSigner);
}
catch (Exception ex)
{
ex.Data.Add("domain", GlobalConfiguration.Configuration.DkimDomain);
ex.Data.Add("from", message.From.Address);
foreach (var emailTo in message.To)
{
ex.Data.Add(string.Format("to{0}", message.To.IndexOf(emailTo)), emailTo.Address);
}
ex.Data.Add("subject", message.Subject);
GlobalConfiguration.Configuration.Logger.Error(ex);
}
}
public void Valid_send_sign_DKIM(string headers)
{
var msg = new MailMessage();
msg.To.Add(new MailAddress(_to, "Jim Bob"));
msg.From = new MailAddress(_from, "Joe Bloggs");
msg.Subject = "Test DKIM Message";
msg.Body = "A simple message";
var dkimSigner = new DkimSigner(PrivateKeySigner.Create(_privateKey), _domain, _selector, GetHeaders(headers));
msg.DkimSign(dkimSigner);
var smtp = new SmtpClient();
smtp.Send(msg);
}