email

var message = new MimeMessage();
    message.From.Add(new MailboxAddress("Your Name", "your-email@yourdomain.com"));
    message.To.Add(new MailboxAddress("", recipientEmail));
    message.Subject = subject;

    message.Body = new TextPart("html")
    {
        Text = body
    };

    using (var client = new SmtpClient())
    {
        // Connect to the SMTP server using STARTTLS
        client.Connect("smtp.titan.email", 587, SecureSocketOptions.StartTls);

        // Authenticate to the SMTP server
        client.Authenticate(username, password);

        // Send the email message
        client.Send(message);

        // Disconnect from the SMTP server
        client.Disconnect(true);
     }