How can I set the MailMessage's body with a HTML file ?
See Question&Answers more detail:osJust set the MailMessage.BodyFormat property to MailFormat.Html, and then dump the contents of your html file to the MailMessage.Body property:
using (StreamReader reader = File.OpenText(htmlFilePath)) // Path to your
{ // HTML file
MailMessage myMail = new MailMessage();
myMail.From = "[email protected]";
myMail.To = "[email protected]";
myMail.Subject = "HTML Message";
myMail.BodyFormat = MailFormat.Html;
myMail.Body = reader.ReadToEnd(); // Load the content from your file...
//...
}