Mimekit 送 email 苹果不渲染 html

Question

When I send emails through C# using library Mimekit everything is fine, but when I want to open them from the Apple application, the screen is blank (it does not interpret the html or CSS )

var email = new MimeMessage();
            email.Sender = MailboxAddress.Parse(_mailSettings.Value.Mail);
            email.To.Add(MailboxAddress.Parse(mail.Email));
            email.Subject = mail.Subject;

            var builder = new BodyBuilder();
            builder.HtmlBody = mail.Body;
            email.Body = builder.ToMessageBody();

            using var smtp = new SmtpClient();
            smtp.Connect(_mailSettings.Value.Host, _mailSettings.Value.Port, SecureSocketOptions.StartTls);
            smtp.Authenticate(_mailSettings.Value.Mail, _mailSettings.Value.Password);

            await smtp.SendAsync(email);
            smtp.Disconnect(true);

Here Image Email

Answer 1

Instead of email.Sender = MailboxAddress.Parse(_mailSettings.Value.Mail); , you should be using email.From.Add(MailboxAddress.Parse(_mailSettings.Value.Mail));

The Sender header works like the From header, but is only meant to be used if it is different from the From header or if the From header contains multiple addresses.

That may or may not fix the Apple mail rendering issue (the mail rendering issue is probably an HTML code issue, not an email issue).