how to set Content-Transfer-Encoding as 8-bit in asp.net

Question

i am sending mail from my asp.net application using c#.

a part of my code

  Message.SubjectEncoding = Message.BodyEncoding = System.Text.Encoding.UTF8;

this sends the charset =utf-8 but Content-Transfer-Encoding :base64

i have gone through Problem sending email with SmtpClient in C# but i have not found how to set Content-Transfer-Encoding as 8-bit

Answer 1

I know this is an old question, but it is an interesting one.

I have found a solution here: https://idevelopdotnet.wordpress.com/2009/03/04/content-transfer-encoding-systemnetmailmailmessage/

Basically, you have to use AlternateViews, as then you can set the Content-Transfer-Encoding. To 7bit only though, not 8bit, but that was good enough for me.

I am not sure why MS made such a mess, but took me hours and hours of finding the right recipe for sending both HTML and plain text the way they should be sent.