[英]failure sending mail in C# .net
我發送電子郵件的代碼在psat兩周內正常工作。 但是現在它顯示了一個錯誤
郵件發送失敗。
我不知道為什么這個問題出現了。 上周發布了一些新的新防火牆策略,是否因為這個問題而引起? 我該怎么辦?
這是我的代碼:
protected void Button1_Click(object sender, EventArgs e)
{
try
{
if (TextBox1.Text == "")
{
string alertmessage = "";
alertmessage = "Email ID. cannot be blank ";
this.CreateMessageAlert(this, alertmessage, "alertKey");
TextBox1.Focus();
}
else if (TextBox2.Text == "")
{
string alertmessage = "";
alertmessage = "CC To cannot be blank ";
this.CreateMessageAlert(this, alertmessage, "alertKey");
TextBox2.Focus();
}
else if (TextBox3.Text == "")
{
string alertmessage = "";
alertmessage = "Subject cannot be blank ";
this.CreateMessageAlert(this, alertmessage, "alertKey");
TextBox3.Focus();
}
else if (TextBox4.Text == "")
{
string alertmessage = "";
alertmessage = "Message Body cannot be blank ";
this.CreateMessageAlert(this, alertmessage, "alertKey");
TextBox4.Focus();
}
//else if (upSignature.FileName == "")
//{
// ctr = 1;
// string alertmessage = "";
// alertmessage = "Attachment Missing...";
// this.CreateMessageAlert(this, alertmessage, "alertKey");
// upSignature.Focus();
//}
else
{
string photo = "Enquiry" + Session["MRNO"].ToString() + FileUpload1.FileName;
string strpath = Request.MapPath("~/");
FileUpload1.SaveAs(strpath + "/Enquiry/" + photo);
try
{
MailMessage mail = new MailMessage();
mail.To.Add(new MailAddress(TextBox1.Text.Trim()));
mail.From = new MailAddress("XXXXXXX");
mail.Subject = "Enquiry for MRNO " + " " + " " + Session["MRNO"].ToString() + " " + " " + "Reg.";
mail.CC.Add(TextBox2.Text.Trim());
mail.Body = TextBox4.Text.Trim();
mail.Attachments.Add(new Attachment(FileUpload1.PostedFile.InputStream, FileUpload1.FileName));
mail.Attachments.Add(new Attachment(FileUpload2.PostedFile.InputStream, FileUpload2.FileName));
//Attachment attach = new Attachment(strpath + "/Enquiry/" + photo);
//mail.Attachments.Add(attach);
SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);
smtp.EnableSsl = true;
smtp.UseDefaultCredentials = false;
smtp.Credentials = new NetworkCredential("XXXXXX", "XXXXXXX");
smtp.Send(mail);
string alertmessage = "";
alertmessage = "Mail Has Been Sent";
this.CreateMessageAlert(this, alertmessage, "alertKey");
// Page.RegisterStartupScript("close", "<script language=javascript>self.close();</script>");
}
catch (Exception ex)
{
Response.Write(ex.Message);
}
}
}
catch (Exception ex1)
{
Response.Write(ex1.Message);
}
}
您需要打開端口587來發送郵件。 請與您的網絡團隊聯系,並確保它已打開
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