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POSending Email with C# - Doesn't work, but no error thrown
 

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    <p>as the topic title suggests, I am trying to send email from my C# application and i'm running into a little bit of trouble.</p> <p>I wrote the function below in order to make it easier to send mail from my app, but i believe there must be a problem somewhere and I just can't see it. Perhaps it's the "Can't see the forest for the trees" scenario.</p> <p>The problem occurs when I try to send email via SMTP. The page just seems to time out, with no error message, at all.. LocalPickup works, as does specifying a pickup directory, but in this instance I need to use SMTP.</p> <p>In this case, my website is located on my home development server (running windows server 2003) and my SMTP server is a remote dedicated box running CentOS Linux with Qmail.</p> <p>I've included the function I wrote, and just to answer any questions.. Yes, the SMTP port on this server is definately 26 ;)</p> <pre><code> /// &lt;summary&gt; /// Sends an email /// &lt;/summary&gt; /// &lt;param name="To"&gt;Addresses to send the email to, comma seperated&lt;/param&gt; /// &lt;param name="subject"&gt;Subject of the email&lt;/param&gt; /// &lt;param name="emailBody"&gt;Content of the email&lt;/param&gt; /// &lt;param name="cc"&gt;CC addresses, comma seperated [Optional]&lt;/param&gt; /// &lt;param name="Bcc"&gt;BCC addresses, comma seperated [Optional]&lt;/param&gt; /// &lt;param name="client"&gt;How to send mail, choices: iis, network, directory. [Optional] Defaults to iis&lt;/param&gt; /// &lt;returns&gt;&lt;/returns&gt; public bool sendMail(string To, string subject, string emailBody, string from, string cc = "", string Bcc = "", string client = "network", bool html = true) { // Create a mailMessage object MailMessage objEmail = new MailMessage(); objEmail.From = new MailAddress(from); // Split email addresses by comma string[] emailTo = To.Split(','); foreach (string address in emailTo) { // Add these to the "To" address objEmail.To.Add(address); } // Check for CC addresses if (cc != "") { string[] emailCC = cc.Split(','); foreach (string addressCC in emailCC) { objEmail.CC.Add(addressCC); } } // Check for Bcc addresses if (Bcc != "") { string[] emailBCC = Bcc.Split(','); foreach (string addressBCC in emailBCC) { objEmail.Bcc.Add(addressBCC); } } // Set the subject. objEmail.Subject = subject; // Set the email body objEmail.Body = emailBody; // Set up the SMTP client SmtpClient server = new SmtpClient(); switch (client) { case "iis": server.DeliveryMethod = SmtpDeliveryMethod.PickupDirectoryFromIis; break; case "network": server.DeliveryMethod = SmtpDeliveryMethod.Network; NetworkCredential credentials = new NetworkCredential("SmtpUserName", "SmtpPassword"); server.Host = "SmtpHost"; server.Port = 26; server.Credentials = credentials; break; case "directory": server.DeliveryMethod = SmtpDeliveryMethod.SpecifiedPickupDirectory; server.PickupDirectoryLocation = "c:\\mailpickup"; break; default: throw new Exception("Invalid delivery method specified, cannot continue!"); } if (html) { // As the email is HTML, we need to strip out all tags for the plaintext version of the email. string s = emailBody; s = Regex.Replace(s, "&lt;.*?&gt;", string.Empty); s = Regex.Replace(s, "&lt;script.*?&lt;/script&gt;", "", RegexOptions.Singleline | RegexOptions.IgnoreCase); AlternateView plainText = AlternateView.CreateAlternateViewFromString(s, null, MediaTypeNames.Text.Plain); objEmail.AlternateViews.Add(plainText); AlternateView rich = AlternateView.CreateAlternateViewFromString(emailBody, null, MediaTypeNames.Text.Html); objEmail.AlternateViews.Add(rich); } try { server.Send(objEmail); return true; } catch(Exception ex) { throw new Exception(ex.ToString()); } </code></pre> <p>As I said, the page just hangs completely after about 60 seconds, with no error message to be seen.</p> <p>Thanks in advance,</p> <p>Dave</p> <p><strong>Addition:</strong> - This is how I am calling sendMail()</p> <pre><code>webMail sendConfirmation = new webMail(); fileSystem fs = new fileSystem(); siteSettings setting = new siteSettings(); string mailBody = fs.file_get_contents("http://myurl.com/mymessage.html"); // Run any replaces. mailBody = mailBody.Replace("{EMAIL_TITLE}", "Your account requires confirmation"); mailBody = mailBody.Replace("{U_FNAME}", u_forename); mailBody = mailBody.Replace("{REG_URL_STRING}", setting.confirmUrl); sendConfirmation.sendMail(u_emailAddress, "Your account requires confirmation", mailBody, setting.siteEmail); </code></pre>
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      1. VTUpMod
    1. CONot likely a code issue. Use telnet to remote into SMTP and test http://support.microsoft.com/kb/153119
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      1. USP.Brian.Mackey
    2. COThat's a lot of code, I suggest using breakpoints.
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      1. USThe Muffin Man
    3. COCan you debug it and see if it throw any exceptions?
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      1. USOrahSoft
 

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