C# E-mail Client Mails Not Received

[cnixuser]

Hi, I am trying to write an application that will e-mail sales data reports once per day. I have largely succeeded in creating the application and I am able to e-mail my reports to some e-mail addresses such as gmail ones ;however, when attempting to send e-mails to addresses on my companies internal server the e-mails never arrive. I was wondering if anyone knew what could allow gmail addresses to receive e-mails from my application, but not allow other servers to receive mail from my application, below is the portion of code doing the e-mailing:

        public string SendEmail()
        {
            try
            {
                using (System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage(EmailFrom, EmailTo))
                {
                    message.Subject = ConfigurationManager.AppSettings["emailSubject"].ToString();
                    message.Body = ConfigurationManager.AppSettings["emailMainBody"].ToString() + "\n\nSent On:\n" + DateTime.Now.ToString() + "\n" + SerialPortCommands.RemoveControlCharacterPairs(SerialPortCommands.Asciireport);
                    //System.Net.Mail.SmtpClient Client = new System.Net.Mail.SmtpClient("localhost");
                    System.Net.Mail.SmtpClient Client = new System.Net.Mail.SmtpClient("127.0.0.1");
                    Client.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.PickupDirectoryFromIis;
                    Client.Send(message);
                    Thread.Sleep(2000);
                }
                return null;
            }
            catch (Exception ex)
            {
                Log.WriteToLog(ex);
                return "Error Code: email-1";
                Application.Restart();
            }
        }

And here are the relevant portions from my App.Config file:

<add key="ToAddress" value="AddressSendingTo@gmail.com"/>
    <add key="FromAddress" value="test@foo.com"/>
    <add key="emailSubject" value="==DEX Collector Message== Your Dex Report Has Been Sent"/>
    <add key="emailMainBody" value="Vending Machine DEX Data"/>
    <add key="MessageSendTime" value="1:17:00 PM"/>

any help would be greatly appreciated, as I am quite stumped :)

[Curtis Rutland]

Are you sure that your emails aren't going to your junk mail boxes? I almost drove myself crazy that way once

[cnixuser]

Are you sure that your emails aren't going to your junk mail boxes? I almost drove myself crazy that way once

When I check my company e-mail address, I find no e-mail in the junk mail box. When I send to my gmail account, the e-mail always goes through with no problem.

[Plater]

I would check the logs on the company email server, they may be getting rejected before even making it to client's emails.
Are you sending the emails from a valid email account? Have you checked THAT accounts email box? There might be like "destinatio n unreachable" or something emails in there that might better describe it.

[cnixuser]

I would check the logs on the company email server, they may be getting rejected before even making it to client's emails.
Are you sending the emails from a valid email account? Have you checked THAT accounts email box? There might be like "destinatio n unreachable" or something emails in there that might better describe it.

Well, I'm not actually sending from an e-mail account that I have set up. For example I can use a purely non-existent dummy address "test@foo.c om", to get the reports sent to gmail.

[Plater]

Well, I'm not actually sending from an e-mail account that I have set up. For example I can use a purely non-existent dummy address "test@foo.c om", to get the reports sent to gmail.

Hmm, try sending from a valid email account and see if your company's server lets the emails go through?

[cnixuser]

Hmm, try sending from a valid email account and see if your company's server lets the emails go through?

I have tried that from my development pc here at work, which does have an e-mail account set up with the company and it works ;however, this won't be doable for the pc's that are going to be hosting the application out in the field. I did consult IT, and found out that our e-mail accounts are actually handled by godaddy.com, would this have any impact on changes that I might have to make to my code?

[Curtis Rutland]

I think that it just has to come from a real valid email address. It can be the same one, but they have to be real.

That's one of those things that are determined by the server.

[Plater]

Yes, just make a dummy account on the email server for it. We use one that's ReportServer@ou rdomain.com that sounds out reports

[cnixuser]

Yes, just make a dummy account on the email server for it. We use one that's ReportServer@ou rdomain.com that sounds out reports

Do you used SmtpClient.Cred entials = new NetworkCredenti al("username"," password"); anywhere in your code, with the object reference to the SmtpClient used instead of directly here of course :)

[Plater]

Well technically no, because I built my own SMTPClient as I disliked the built in one.
But yes, I *DO* send the authentication information to the mail server, my mail server won't send emails out unless you are a valid user.

[cnixuser]

Well technically no, because I built my own SMTPClient as I disliked the built in one.
But yes, I *DO* send the authentication information to the mail server, my mail server won't send emails out unless you are a valid user.

Have you had success sending to e-mail accounts hosted on goDaddy servers?

[Plater]

Have you had success sending to e-mail accounts hosted on goDaddy servers?

I have not had any failures that I have seen.

[cnixuser]

I have not had any failures that I have seen.

I just can't figure out what it could be. I am able to send to gmail just fine without using credentials.

[Plater]

I just can't figure out what it could be. I am able to send to gmail just fine without using credentials.

And I we all keep telling you that you need to use credentials.
There really shouldn't be anything difficult to grasp on this concept.
Have you even tried to use valid credentials?