fixed it by dowloading your code at github and replacing the dll file at my project...
Hello I'm using 1.0.3.0. I'm Greek. Subject encoding has problem. => ?? mailMessage.SubjectEncoding = Encoding.UTF8; mailMessage.Subject = "Θελω να μου βρείτε λύση"; // <= display text is "??" help me, please... Best Regards. Themis