使用asp.net发送邮件给多个收件人

Question

I have the following code inside my asp.net mvc-5 web application:-

string from = "info@Oursystem.com"; 
                using (MailMessage mail = new MailMessage(from, "user1@Oursystem.com"))
                {

currently when i try to add multiple recipients for the email as follow :-

string from = "info@Oursystem.com"; 
                using (MailMessage mail = new MailMessage(from, "user1@Oursystem.com;user2@Oursystem.com"))
                {

it will not send any emails, so can anyone advice on this please ?

Answer 1

Try ewith following namespaces.

string from = test@test.com;
string to = test123@testing.com;
string to1 =test1234@testing.com;

mail.From = new System.Net.Mail.MailAddress(from);
mail.To.Add(new System.Net.Mail.MailAddress(to));
mail.To.Add(new System.Net.Mail.MailAddress(to1));

MailMessage take a single reciver for to

public MailMessage( MailAddress from, MailAddress to )

Check here

So you have to add objects for others recivers in to list

Answer 2

Try this -

        string from = "info@Oursystem.com"; 
        using (MailMessage mail = new MailMessage())
        {
            mail.From = new MailAddress(from);
            mail.To.Add("user1@Oursystem.com");
            mail.To.Add("user2@Oursystem.com");
        }

The new MailMessage() constructor takes arguments for both from and to , and should be used when you have just single recipient. In case of multiple recipient, you have to add them to the mail.To collection

Answer 3

public class MailHandler
{

public bool SendEMail(string smtpHost ="smtp.gmail.com", int port = 587, string senderMail , string  senderPass, ArrayList mailToArr, string subject, bool isHtml, string body)
    {
        try
        {

            SmtpClient smtpClient = new SmtpClient(smtpHost, port);
            smtpClient.UseDefaultCredentials = false;// true;
            smtpClient.Credentials = new System.Net.NetworkCredential(senderMail, senderPass);
            smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
            smtpClient.EnableSsl = true;

            MailMessage mail = new MailMessage();
            mail.From = new MailAddress(senderMail);
            for (int i = 0; i < mailToArr.Count; i++)
            {
                mail.To.Add(new MailAddress((string)mailToArr[i]));
            }
            mail.Subject = subject;
            //mail.CC.Add(new MailAddress("MyEmailID@gmail.com"));
            mail.Body = body;
            mail.IsBodyHtml = isHtml;
            mail.Priority = MailPriority.Normal;

            smtpClient.Send(mail);

            return true;
        }
        catch (Exception ex)
        {
            return false;

            // write exception on server log

        }

    }
}

//to call function

                ArrayList mailToArr = new ArrayList();
                mailToArr.Add("to first email address");
                mailToArr.Add("to second email address");
                mailToArr.Add("to third email address");

                MailHandler objMailhandler = new MailHandler();
                string subject = "subject";
                string body = "<h1>  Password Request </h1> " ;


                objMailhandler.SendEMail("smtp.gmail.com", 587, senderMail , senderPass,mailToArr, subject, true, body);