Question

So I am making a program that emails a list of users from a .txt file. Here is what I have so far.

MailAddress from = new MailAddress("[e-mail]", "MAIL BOT TEST");
        MailAddress to = new MailAddress("testadmin", "Admin");
        MailMessage message = new MailMessage(from, to);

using (StreamReader sr3 = new StreamReader(@"C:\Data\Items\emailItems.txt"))
         {
             string emailList;
             emailList = sr3.ReadToEnd();
             MailAddress bcc = new MailAddress(emailList);
             message.Bcc.Add(bcc);

             Console.WriteLine(emailList);
             MessageBox.Show("" + emailList, "Email List", MessageBoxButtons.OK);
         }

The emailList will not work since it throws an exception and it takes:

MailAddress bcc = new MailAddress("[e-mail]");

Below is how the .txt is formatted. Should I seperate them with comments?

[e-mail]
[e-mail]

Here is the exception thrown:

{"The specified string is not in the form required for an e-mail address."}

Thanks and Cheers,
Sean.

Answer 1

MailAddress can only take a single address, not a list, so you need to add a MailAddress to Bcc for each recipient.

Assuming your text file has each e-mail address on a line of its own (and your question suggests it has), try this:

string[] recipients = File.ReadAllLines(@"C:\Data\Items\emailItems.txt");

string recipient;

foreach (var recipientLine in recipients)
{
     // Just to take care of leading/trailing spaces and blank lines
     recipient = recipientLine.Trim();
     if (!string.IsNullOrEmpty(recipient))
     {
         MailAddress bcc = new MailAddress(recipient);
         message.Bcc.Add(bcc);   
     }
}