How to send a mass email on a server use IMAP protocol ?

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Hi,

Sorry my english,

I create a program to use for sending a mass email for a mail server that use IMAP protocol, I use a similary code of the smtp.gmail.com and when I send,I received all the time this error : The remote certificate is invalid according to the validation procedure.
This is my code:

VB

Dim SmtpServer As New SmtpClient()
SmtpServer.Credentials = New Net.NetworkCredential("info@abc.com", "xxxx")
SmtpServer.Host = "smtp.abc.com"
SmtpServer.Port = 587
SmtpServer.EnableSsl = True

EMail.From = New System.Net.Mail.MailAddress("info@abc.com")

SmtpServer.Send(EMail)

Do you have a solution for this error message? or what I need to do for fixing this problem?

Thanks

Marcel
mprim58@yahoo.com

Posted 23-Sep-11 2:17am

Marcel Primeau

Updated 23-Sep-11 2:38am

Richard MacCutchan

v2

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uspatel · Answer 1 · 2011-09-23T02:52:00

It works well,But it is in C#,Try to understand.It will helps you

C#

public static Boolean SendingMail(string From, string To, string Subject, string Body)
    {
        
            try
            {
                MailMessage m = new MailMessage("Senedr<id@domain.com>", To);
                m.Subject = Subject;
                m.Body = Body;
                m.IsBodyHtml = true;
                m.From = new MailAddress(From);

                m.To.Add(new MailAddress(To));
                SmtpClient smtp = new SmtpClient();
                smtp.Host = "smtp.gmail.com";
              
                NetworkCredential authinfo = new NetworkCredential("id@domain.com", "pwd");
                smtp.UseDefaultCredentials = false;
                smtp.Credentials = authinfo;
                smtp.Send(m);
                return true;

               


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