Malformed subject after casting from MailMessage to MimeMessage

[Sicos1977]

Hi,

I got some strange behavior when casting a MailMessage to a MimeMessage like this.

        public string WriteMessage(Email email, MailMessage message)
        {
            var mimeMessage = (MimeMessage) message;
            mimeMessage.Date = email.SendDate;
            return WriteMessage(mimeMessage);
        }

The subject gets UTF8 encoded,

When I open this message in Outlook the subject looks like this

At the moment I just fixed it like this
mimeMessage.Subject = message.Subject;

[jstedfast]

Is this after you sent the message via System.Net.Mail.SmtpClient?

I highly recommend avoiding this method. It will likely never be perfect - it's intent is only as a temporary solution for developers porting to MailKit, not intended as a real solution for production.

[Sicos1977]

Well I just used it for the thing you mentioned... porting to MailKit. At the moment it was to much work to rewrite a lot of code and so I took the easy way.... casting :-).

But to answer your question. I had the problem before sending it.