Send Mail Async In Asp.net - asp.net

I have this code
protected void ASPxButton1_Click(object sender, EventArgs e)
{
MailMessage mail = new MailMessage();
mail.From = new MailAddress("paragonadmin#qss.co.za", "Paragon Admin");
mail.To.Add(new MailAddress("dewald#qss.co.za", "Appointment Scheduled"));
mail.Subject = "Enter mail subject";
mail.Body = "Enter mail body";
SmtpClient smtpClient = new SmtpClient("smtp.qss.co.za");
smtpClient.Credentials = new System.Net.NetworkCredential("paragonadmin#qss.co.za", "123456");
Object state = mail;
//event handler for asynchronous call
smtpClient.SendCompleted += new SendCompletedEventHandler(smtpClient_SendCompleted);
try
{
//smtpClient.Send(mail);
smtpClient.SendAsync(mail, state);
}
catch (Exception ex) { /* exception handling code here */ }
}
void smtpClient_SendCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
{
MailMessage mail = e.UserState as MailMessage;
if (!e.Cancelled && e.Error != null)
{
ASPxLabel1.Text = "Mail sent successfully";
}
}
It is supposed to send a mail asynchronous in my application, but for some reason I get a "Failure sending mail" error message.
Any advice

Related

SMTP Mail code working form local host but not fom server

SMTP mail code working from ASP .net local server but not from server here is my code :
protected void btn_send_Click(object sender, EventArgs e)
{
System.Net.Mail.MailMessage mail = new System.Net.Mail.MailMessage();
mail.To.Add("to gmail address");
mail.From = new MailAddress("from gmail address", "Email head", System.Text.Encoding.UTF8);
mail.Subject = "This mail is send from asp.net application";
mail.SubjectEncoding = System.Text.Encoding.UTF8;
mail.Body = "This is Email Body Text";
mail.BodyEncoding = System.Text.Encoding.UTF8;
mail.IsBodyHtml = true;
mail.Priority = MailPriority.High;
SmtpClient client = new SmtpClient();
client.Credentials = new System.Net.NetworkCredential("from gmail address", "your gmail account password");
client.Port = 587;
client.Host = "smtp.gmail.com";
client.EnableSsl = true;
try
{
client.Send(mail);
Page.RegisterStartupScript("UserMsg", "<script>alert('Successfully Send...');if(alert){ window.location='SendMail.aspx';}</script>");
}
catch (Exception ex)
{
Exception ex2 = ex;
string errorMessage = string.Empty;
while (ex2 != null)
{
errorMessage += ex2.ToString();
ex2 = ex2.InnerException;
}
Page.RegisterStartupScript("UserMsg", "<script>alert('Sending Failed...');if(alert){ window.location='SendMail.aspx';}</script>");
}
This is not working as per expected. I'm trying to send an email from feedback form.

Tracking Bounced Emails Through ASP.Net

Is there any way I can track (through the code) the bounced emails.
Consider the email id like 'skdfisdcnsodioifs#gmail.com'. This is valid email id but does not exists so certainly it will be bounced backed.
I am using ASP.Net's SmtpClient with "message.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure". However it still shows the message sent successfully and after ~20-25 minutes I get the fail delivery notification email.
Below is my code
class Program
{
static void Main(string[] args)
{
SmtpClient client = new SmtpClient("xxxx.xxxxxx.xxx", 25);
client.Credentials = new NetworkCredential("xxxxxx#xxxxxx.com", "xxxxxx");
MailAddress to = new MailAddress("abcdsfasdfasdfasdfasdf2342342defgh#gmail12333.com");
MailAddress from = new MailAddress("xxxxxx#xxxxxx.com");
MailMessage message = new MailMessage(from, to);
message.Headers.Add("Return-Path", "xxxxxx#gmail.com");
message.ReplyToList.Add(new MailAddress("xxxxxx#gmail.com"));
message.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure | DeliveryNotificationOptions.OnSuccess;
message.Subject = "Test POC";
message.Body = "This is a test e-mail message sent by an application. ";
client.SendCompleted += client_SendCompleted;
string UserState = "test";
client.Timeout = 3;
try
{
Console.WriteLine("start to send email ...");
client.DeliveryMethod = SmtpDeliveryMethod.Network;
client.SendAsync(message,UserState);
Console.WriteLine("email was sent successfully!");
}
catch (SmtpFailedRecipientsException ep)
{
Console.WriteLine("failed to send email with the following error:");
Console.WriteLine(ep.Message);
}
catch (Exception ep)
{
Console.WriteLine("failed to send email with the following error:");
Console.WriteLine(ep.Message);
}
Console.WriteLine("test.");
Console.ReadKey();
}
static void client_SendCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
{
// Get the unique identifier for this asynchronous operation.
//String token = (string)e.UserState;
if (e.Cancelled)
{
Console.WriteLine("Send canceled.");
}
if (e.Error != null)
{
Console.WriteLine("[{0}] ", e.Error.ToString());
}
else
{
Console.WriteLine("Message sent.");
}
}
}
Thanks in advance.
Abhishek

Unable to send mail if one mail not present with ASP

I've written code for sending a newsletter, all is working fine, but there is a problem if one of the email addresses in the list, doesn't exit or the domain does not exist.
In this case the script stops immediately and the sending of the mail list is not finished.
Here is the part of the code I want to modify.
public static void SendMessage(String sender, String recipient, String message, String object)
{
try
{
MailMessage mail = new MailMessage(sender, recipient);
mail.Subject = object;
mail.IsBodyHtml = true;
mail.Body = message;
SmtpClient smtp = new SmtpClient();
smtp.Host = "my.smtp.com";
smtp.Send(mail);
}
catch (Exception e)
{ throw new Exception("AdminEmail - SendMessage >> recipient: " + recipient + " - generic error: " + e.Message); }
}
Hope somone can help me, thank you very much!
Welcome to SO.
From what I can infer from your description your are not handling the exception that is thrown by SendMessage.
Handle the exception in the caller method. Or do a dirty fix as shown below...
This is not a real fix. But will help you understand the issue...You have to determine in your calling method what to do if SendMessage throws an exception.
public static void SendMessage(String sender, String recipient, String message, String object)
{
try
{
MailMessage mail = new MailMessage(sender, recipient);
mail.Subject = object;
mail.IsBodyHtml = true;
mail.Body = message;
SmtpClient smtp = new SmtpClient();
smtp.Host = "my.smtp.com";
smtp.Send(mail);
}
catch (Exception e)
{
//Just log error and continue to process
}
}

How can i send a comment in email?

I have some text boxes like name,email address,phone no. and comment on my page.
I have to send the values to my email address..
How should I do this??
I am doing:
protected void btnSubmit_Click(object sender, EventArgs e)
{
SmtpClient client = new SmtpClient();
MailMessage message = new MailMessage();
try
{
MailAddress fromAddress = new MailAddress(txtEmail.Text, txtName.Text);
SmtpClient.Host = "localhost";
SmtpClient.Port = 25;
message.From = fromAddress;
message.To.Add("xyz#gmail.com");
message.Subject = "Feedback";
message.IsBodyHtml = false;
message.Body = txtComment.Text;
SmtpClient.Send(message);
Response.Write("Email successfully sent.");
}
catch (Exception ex)
{
Response.Write("Send Email Failed." + ex.Message);
}
}
and I am getting the following error:
An object reference is required for the nonstatic field, method, or property 'System.Net.Mail.SmtpClient.Send(System.Net.Mail.MailMessage)'
SmtpClient.Host = "localhost";
SmtpClient.Port = 25;
~~~~~~~~~~~~~~~~~~~~
SmtpClient.Send(message);
These lines are attempting to use members of the class SmtpClient. However, as these members are not defined as static, you need to refer to your instance of that class, which you have called client.
Try
client.Host = "localhost";
client.Port = 25;
~~~~~~~~~~~~~~~~~~~~
client.Send(message);
Also, have a read of this article on the differences between class and instance members.
Finally, as SmtpClient implements IDisposable, I would change your code to wrap it in a using block, as this will ensure you are correctly cleaning up your SMTP session after you are finished with it.
using (SmtpClient client = new SmtpClient())
{
// YOUR CODE
}
public static string sendMail(string to, string title, string subject, string body)
{
try
{
MailMessage mail = new MailMessage();
SmtpClient smtp = new SmtpClient();
MailAddress fromAddress = new MailAddress(txtEmail.Text, txtName.Text);
if (to == "")
to = fromAddress.Address;
MailAddressCollection m = new MailAddressCollection();
m.Add(to);
mail.Subject = subject;
mail.From = fromAddress;
mail.Body = body;
mail.IsBodyHtml = true;
mail.ReplyTo = fromAddress;
mail.To.Add(m[0]);
smtp.Host = "smtp.gmail.com";
smtp.Port = 25;
smtp.EnableSsl = true;
smtp.Credentials = new System.Net.NetworkCredential(fromAddress.Address, "XXXX");//"XXXX" is the password of the sender.
ServicePointManager.ServerCertificateValidationCallback = delegate(object s, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors) { return true; };
smtp.Send(mail);
return "done";
}
catch (Exception ex)
{
return ex.Message;
}
}
i had done this:-
protected void btnSubmit_Click(object sender, EventArgs e)
{
MailMessage mailmsg = new MailMessage();
string name = txtName.Text.ToString();
string contact = txtPhoneNo.Text.ToString();
string comment = txtComment.Text.ToString();
string checkIn = txtCheckIn.Text.ToString();
string from = txtEmail.Text.ToString();
mailmsg.To.Add("recipientemailid#gmail.com");
mailmsg.From = new MailAddress(from.Trim());
mailmsg.Subject = "Test message";
mailmsg.Body = "This Query is submitted by user " + name.Trim() + ", "+ contact.Trim() + ", " + comment.Trim() + ", " + checkIn.Trim();
mailmsg.IsBodyHtml = true;
SmtpClient client = new SmtpClient("smtp.gmail.com", 587);
client.EnableSsl = true;
NetworkCredential credentials = new NetworkCredential("recipientemailid#Gmail.com", "password");
client.Credentials = credentials;
try
{
//try to send the mail message
client.Send(mailmsg);
Response.Write("sent!");
}
catch
{
//some feedback if it does not work
Response.Write("failed!");
}
}
Try
client.Host = "localhost";
client.Port = 465;
~~~~~~~~~~~~~~~~~~~~
client.Send(message);
Do not try to use or manage disposable emails with this because you will be clearly exposed to spam-trappers. Your code is open and very easy to identify who is using the code and from where.

Is there any way to send the Email notification using asp.net without using credentials?

I have this code to send email notification in my page.
MailAddress to = new MailAddress("xxxxx#gmail.com");
MailAddress from = new MailAddress("xxx#gmail.com");
MailMessage message = new MailMessage(from, to);
message.Subject = "Error Occred in the application:";
message.Body = ex.Message;
SmtpClient client = new SmtpClient("smtp.gmail.com", 587);
client.EnableSsl = true;
client.Credentials = new NetworkCredential("user", "password");
Is there any other way we have without giving credentials to send the message?
There are some workarounds mentioned here
Only on servers that allow anonymous sending, which Gmail doesn't.
If you have an open mail relay that doesn't require credentials, then you don't need to supply them.
use this code spinet for that,
protected void btnSubmit_Click(object sender, EventArgs e)
{
try
{
MailAddress SendFrom = new MailAddress(txtFrom.Text);
MailAddress SendTo = new MailAddress(txtTo.Text);
MailMessage MyMessage = new MailMessage(SendFrom, SendTo);
MyMessage.Subject = txtSubject.Text;
MyMessage.Body = txtBody.Text;
Attachment attachFile = new Attachment(txtAttachmentPath.Text);
MyMessage.Attachments.Add(attachFile);
SmtpClient emailClient = new SmtpClient(txtSMTPServer.Text);
emailClient.Send(MyMessage);
litStatus.Text = "Message Sent";
}
catch (Exception ex)
{
litStatus.Text=ex.ToString();
}
}
i hope this will be helpful.

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