Send Email with localhost IIS SSL

First you need to configure STMP e-mail with IIS SSL. Follow below links:

https://docs.microsoft.com/en-us/iis/application-frameworks/install-and-configure-php-on-iis/configure-smtp-e-mail-in-iis-7-and-above

https://www.emailarchitect.net/easendmail/kb/csharp.aspx?cat=1

Next to send the e-mail using SSL:

MailMessage message = new MailMessage();
SmtpClient smtpClient = new SmtpClient();
string msg = string.Empty;
MailAddress fromAddress = new MailAddress(from);
message.From = fromAddress;
message.To.Add(toList);
if (ccList != null && ccList != string.Empty)
message.CC.Add(ccList);
message.Subject = subject;
message.IsBodyHtml = true;
message.Body = body;
smtpClient.Host = "smtp.gmail.com"; // We use gmail as our smtp client
smtpClient.Port = 587;
smtpClient.EnableSsl = true;
smtpClient.UseDefaultCredentials = true;
smtpClient.Credentials = new System.Net.NetworkCredential("Your Gmail User Name", "Your Gmail Password");
smtpClient.Send(message);

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