Sending Mail using C#

++++++++Sending mail using C# and Async and Await .


*********** I have used this setting in Web.config file ***************
<add key="fromMail" value="donotreply@DomainName" />
    <add key="actualId" value="0" />
    <add key="SmtpServer" value="SmtpServer Name" />
    <add key="Username" value="UsernameOfYourServer" />
    <add key="Password" value="SmtpServerPassword" />
**************End here ******************************


 $$$$$$$$$$$$$$$$ function for sending mail $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

public async Task<string> SendMail(string Body, string ToaddressEmailID, string Subject)
        {
            MailAddress toAddress = null;
            MailAddress fromAddress = new MailAddress(ConfigurationManager.AppSettings["fromMail"].ToString());
            if (ConfigurationManager.AppSettings["actualId"].ToString() == "0") //  This for local testing , i have put 0 for local testing
            {
                toAddress = new MailAddress("ankit@gamil.com");
            }
            else
            {
                toAddress = new MailAddress(ToaddressEmailID);
            }
            var message = new MailMessage(fromAddress, toAddress);
               
            message.Subject = Subject;
            message.Body = Body;
            message.IsBodyHtml = true;
            message.Priority = MailPriority.High;
            message.DeliveryNotificationOptions = DeliveryNotificationOptions.OnSuccess;
            string ServerName = ConfigurationManager.AppSettings["SmtpServer"].ToString(); // SMTP server name here you need to configur your server
            string Username = ConfigurationManager.AppSettings["Username"].ToString(); // getting value from Web.config file as you can see in above code 
            string Password = ConfigurationManager.AppSettings["Password"].ToString();
            using (var smtp = new SmtpClient(ServerName))
            {
                var credential = new NetworkCredential
                {
                    UserName = Username,
                    Password = Password
                };
                smtp.Credentials = credential;
              //  smtp.EnableSsl = true; // if you want to enable ssl for security you can uncomment that line but you need  SSL certificate
             
                try
                {
                    await smtp.SendMailAsync(message);
               
                    return "Successfully sent mail";
                }
                catch (Exception ex)
                {
                    return ex.Message.ToString();
                }
            }


        }