Question 87818 in ASP.NET Question posted in
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Suddenly getting the error Failure Sending Mail in ASP.Net

I am continuously getting this error failure sending mail. I have already tried by changing port 465/25/587 but nothing worked. My credentials are also correct. All these configurations are for outlook. Checked all the ports they are also not blocked. The same code was working fine before but from last couple of days getting this error. Unable to get what’s happening in this code.

Below is my code-

 protected void btnSubmitClick(object sender, EventArgs e)
    {
         try
        {
            if (ddlSubCategory.SelectedIndex > 0)
            {
                if (Session["sessionID"] != null && Session["sessionID"].ToString().ToUpper().Trim() == "SUBMITTED")
                {
                   // string textForMessage = @"<script language='javascript'> alert('Request Already Submitted for the same...!');</script>";
                   // ClientScript.RegisterClientScriptBlock(this.GetType(), "Stop", textForMessage); return;
                }
                if (fupAttachment.HasFile) { ViewState["file1"] = "0"; }
                if (ViewState["file1"].ToString() == "0")
                {
                    IssuesCommon issueCommon = new IssuesCommon();
                    issueCommon.IssueCateId = Convert.ToInt32(ddlSubCategory.SelectedValue);
                    issueCommon.Status = "OPEN";
                    issueCommon.LogBy = issueCommon.EmpId = Convert.ToInt32(getEmpDetail().Split('$')[0]);
                    issueCommon.Description = txtDesc.Text.Trim();
                    issueCommon.WorkStation = txtWorkStation.Text.Trim();
                    issueCommon.IPAddress = hfIP.Value;
                    issueCommon.Contact = txtphn.Text.Trim();
                    issueCommon.DepartmentId = Convert.ToInt32(Request.QueryString["help"]);
                    issueCommon.Supervisor = hfSuperId.Value;
                    string ticket = lblDeskName.Text + "#00" + Convert.ToString(Convert.ToInt32(objBal.getMaxIssueID()) + 1);
                    issueCommon.TicketNo = ticket;
                    issueCommon.Priority = (ddlPriority.SelectedValue == "Low" ? ddlSubPriority.SelectedValue : ddlPriority.SelectedValue);
                    issueCommon.attachmentName = fupAttachment.HasFile ? Server.MapPath("~/image/") + fupAttachment.FileName : null;

                    if (trSelectClient.Visible == true)
                    {
                        issueCommon.clientName = ddlClientList.SelectedValue.ToString() == "--Select--" ? "" : ddlClientList.SelectedValue.ToString();
                    }
                    else
                    {
                        issueCommon.clientName = "";
                    }

                    objBal.InsertIssue(issueCommon);

                     #region Mail Section
                    MailMessage mM = new MailMessage();
                    mM.From = new MailAddress("[email protected]");
                    mM.To.Add(getDapartmentEmailId());
                    
                    if (txtAddRecipient.Text != "" && txtAddRecipient.Text != null && trAddRecipient.Visible == true)
                    {
                        mM.CC.Add(txtAddRecipient.Text);
                    }
                    if (Session["help"] != null)
                    {
                        if (Convert.ToString(Session["help"]) == "1")
                        {
                            mM.Bcc.Add("[email protected]");
                        }                  
                    }
                    if (fupAttachment.HasFile)
                    {
                        string filename = fupAttachment.FileName;
                        fupAttachment.SaveAs(Server.MapPath("~/images/") + filename);
                        Attachment attach = new Attachment(Server.MapPath("~/images/") + filename);
                        mM.Attachments.Add(attach);
                    }
                    mM.Subject = "Issue Ticket#: " + issueCommon.TicketNo + " [Priority: " + issueCommon.Priority + "]";
                    string mailBody = "Hello," +
                      "<br/> I am having the below issue: <br/><br> Issue Category : " + ddlSubCategory.SelectedItem.Text
                       + " <br/> <br/> Workstation: " + txtWorkStation.Text + " <br/><br/> IP Address : " + txtIP.Text
                       + "<br /><br /> Client Name: " + ddlClientList.SelectedValue.ToString().Replace("--Select--", "N/A")
                        + "<br /><br /> My ContactNo: " + txtphn.Text
                       + "<br/><br/> Description : " + txtDesc.Text.Trim() + "<br/><br/> Thanks, <br/>" + hfEmpid.Value + "/" + username.Text;
                    mM.Body = mailBody;
                    mM.IsBodyHtml = true;
                    mM.Priority = MailPriority.High;
                    SmtpClient sC = new SmtpClient("smtp.office365.com");
                    sC.Port = 587;
                    sC.EnableSsl = true;
                    sC.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
                    sC.Credentials = new NetworkCredential("email", "password");               
                    sC.Send(mM); 
                   SendMailtoUser(issueCommon.TicketNo, lblUserName.Text.Trim());
                    Session["sessionID"] = "Submitted"; ViewState["file1"] = "0"; clearView();
                    Page.ClientScript.RegisterStartupScript(GetType(), "msgbox", "alert('Your request has been submitted successfully');", true);
                    #endregion
                }
                else
                {
                    string textForMessage = @"<script language='javascript'> alert('Select Attachment ');</script>";
                    ClientScript.RegisterClientScriptBlock(this.GetType(), "UserPopup", textForMessage);
                }
            }
            else { Page.ClientScript.RegisterStartupScript(GetType(), "msgbox", "alert('Select Issue Category');", true); }
        }
        catch (Exception ex) { 
            Page.ClientScript.RegisterStartupScript(GetType(), "msgbox", "alert('" + ex.Message.Replace("'", "") + "');", true); }
    }

Please see the exception screenshot here
enter image description here

Tags:

2

Answers


  1. 0

    if you try this i think sending mail will be successful

    var smtpClient = new SmtpClient(hostname, 25);
// userNameShort = "ab", domain = "outlook" for example
var networkCredential = new NetworkCredential(userNameShort, password, domain);
smtpClient.Credentials = networkCredential;
ServicePointManager.ServerCertificateValidationCallback = delegate (object s, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors) { return true; };
smtpClient.EnableSsl = true;
smtpClient.Send(message);
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  2. 0

    Please can you trying:

    SmtpClient sC = new SmtpClient("smtp.office365.com");

    after adding

    sC.Credentials = new NetworkCredential("email", "password");

    then

     sC.Port = 587;
//your codes
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