here is the code.
void sendMail()
{
MailMessage mail = new MailMessage();
mail.To.Add("abc#gmail.com");
mail.From = new MailAddress("abc#gmail.com", txt_name.Text);
mail.Subject = txt_subject.Text;
mail.Body = txt_body.Text;
SmtpClient smtp = new SmtpClient("smtp.gmail.com");
smtp.EnableSsl = true;
NetworkCredential yetki = new NetworkCredential("abc#gmail.com", "11111111");
smtp.Credentials = yetki;
smtp.Send(mail);
Response.Write("mailiniz başarılı bir şekilde gönderilmiştir");
}
protected void btn_gonder_Click(object sender, EventArgs e)
{
sendMail();
}
Use a try/catch block
void sendMail() {
try{
MailMessage mail = new MailMessage();
mail.To.Add("abc#gmail.com");
mail.From = new MailAddress("abc#gmail.com", txt_name.Text);
mail.Subject = txt_subject.Text;
mail.Body = txt_body.Text;
SmtpClient smtp = new SmtpClient("smtp.gmail.com");
smtp.EnableSsl = true;
NetworkCredential yetki = new NetworkCredential("abc#gmail.com", "11111111");
smtp.Credentials = yetki;
smtp.Send(mail);
Response.Write("mailiniz başarılı bir şekilde gönderilmiştir");
}
catch(Exception e){
Response.Write(e.Message);
}
}
The error indicating it is unhandled means you didn't catch the exception. Now what you actually do in the catch block to handle the exception is up to you, such as logging it to a file, queuing a retry, or showing a message box. Or trying to do something to prevent the exception in the first place.
protected void btn_gonder_Click(object sender, EventArgs e)
{
try{
sendMail();
}
catch(Exception ex)
{
}
}
Also note you can access ex.Message to see the exception message, or add a break point to the catch block and inspect ex. It is possible there is more you need to do to get it to work with gmail because of the requirements for authentication. I don't know if the network credentials are enough. I've always had trouble with it and resorted to using my ISP's email account that doens't require authentication.
You add a try/catch block to your code and ignore the error, or you post the entire exception message so that we can help you solve the actual problem.
According to this page when sending mail over SSL you should use port 465 i.e.
SmtpClient smtp = new SmtpClient("smtp.gmail.com");
smtp.EnableSsl = true;
smtp.Port = 465;
...
You should probably still wrap the call to Send in a try/catch block and handle any SmtpException that gets thrown if you can do anything about it.
Note you can also put smtpClient configuration in the web.config file (see here for example).
You haven't specified the port number for Gmail which is 587.
smtp.port = 587;
And your problem should be solved. Otherwise your code looks good.
Related
when I send email using STMP in C#, I can't make sure that the email has been send although I have used SendCompleted Event Handler. this is my code:
private void btnLogin1_Click(object sender, EventArgs e)
{
try
{
MailAddress FromAddress = new MailAddress("*******", "*******");
MailAddress ToAddress = new MailAddress("*****");
String FromPassword = "******";
SmtpClient SMTP = new SmtpClient();
SMTP.Host = "smtp.yandex.com";
SMTP.Port = 587;
SMTP.EnableSsl = true;
SMTP.DeliveryMethod = SmtpDeliveryMethod.Network;
SMTP.UseDefaultCredentials = false;
SMTP.Credentials = new NetworkCredential(FromAddress.Address, FromPassword);
SMTP.SendCompleted += SMTP_SendCompleted;
MailMessage Message = new MailMessage();
Message.From = FromAddress;
Message.To.Add(ToAddress);
Message.Subject = "Welcome";
Message.SubjectEncoding = Encoding.UTF8;
Message.Priority = MailPriority.High;
Message.IsBodyHtml = true;
Message.Body = "<b>Test Mail</b>";
Message.BodyEncoding = Encoding.UTF8;
SMTP.Send(Message);
}
catch { }
}
private void SMTP_SendCompleted(object sender, AsyncCompletedEventArgs e)
{
MessageBox.Show("Sent");
}
}
Thanks in advance.
You need to put some error handling code inside
Catch {...}
Otherwise, you are just catching an error and ignoring it.
If the catch block doesn't fire, then as far as you can be reasonably sure (without checking for a delivery receipt), then you can assume the email has been successfully sent.
If you are using the SendCompleted event, then the email needs sent asynchronously using SendAsync. Otherwise, the method will not return control until after the email is either sent or fails.
In the example you posted, the empty catch is swallowing up any errors that may be occurring to even determine that much.
So either use the SendAsync so that your event gets fired, or actually see if any exceptions are being caught. Empty catch blocks that aren't even catching any specific exception are terrible ideas in nearly every situation. They lead to all sorts of problems.
I am unable to connect to the frontier mail server with the following code. I get the message "Unable to connect to remote server". I am running the program using C# on my local computer.
try
{
MailMessage mail = new MailMessage();
SmtpClient SmtpServer = new SmtpClient("smtp.frontier.com");
mail.From = new MailAddress(emailaddress);
mail.To.Add("xxxx#frontier.com");
mail.Subject = thistitle;
mail.Body = thisdescription;
System.Net.Mail.Attachment attachment;
attachment = new System.Net.Mail.Attachment(thisimage);
mail.Attachments.Add(attachment);
SmtpServer.Port = 25;
SmtpServer.Credentials = new System.Net.NetworkCredential("username", "xxxxxxx");
SmtpServer.EnableSsl = true;
SmtpServer.Send(mail);
MessageBox.Show("Mail sent");
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), "Email Error Message");
}
Can anyone tell if I have the correct parameters for Frontier mail? I know they use Yahoo but I tried that also with no success. Isn't it possible to run a mail server from my local machine? Any help is appreciated.
just try remove this code SmtpServer.EnableSsl = true;
Does your ISP block SMTP traffic? (this is often the case for non-commercial accounts).
If not... rewrite you code closer to this:
try
{
using (var attachment = new Attachment(thisimage))
using (var mail = new MailMessage())
{
mail.From = new MailAddress(emailaddress);
mail.To.Add("xxxx#frontier.com");
mail.Subject = thistitle;
mail.Body = thisdescription;
mail.Attachments.Add(attachment);
using (var client = new SmtpClient("smtp.frontier.com"))
{
client.Port = 25;
client.Credentials = new System.Net.NetworkCredential("username", "xxxxxxx");
client.EnableSsl = true;
client.Send(mail);
}
}
MessageBox.Show("Mail sent");
}
catch (SmtpException ex)
{
// go read through https://msdn.microsoft.com/en-us/library/swas0fwc(v=vs.110).aspx
// go read through https://msdn.microsoft.com/en-us/library/system.net.mail.smtpexception(v=vs.110).aspx
}
#if DEBUG
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), "Email Error Message");
}
#endif
}
...and run it in a debugger and look at what the SmtpException is reporting. There are myriad reasons why you may fail a connection.
Im unable to comment so I will type my comment as an answer. Are you able to use ImapClient instead of SmtpClient ? With Imap, you can do some authenticating processes. Could be the issue, it only looks like you are signing in. For Imap I do this:
using (var clientTest = new ImapClient())
{
clientTest.Connect("xxxx#frontier.com");
clientTest.AuthenticationMechanisms.Remove("XOAUTH");
clientTest.Authenticate(eMail, pw);
bIsConnected = clientTest.IsConnected;
if (bIsConnected == true)
{
/// Insert Code here
}
}
I'm sending simple email messages in my application using smtp client and I was using this code before and it just works fine. Now, when I tried to run my project again from my local host computer and try to send email messages. I got a runtime error that says
The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required.
I don't know what just happened since it was working fine before. Now I can't send email and all I've got is this error. I could hardly troubleshoot what went wrong. How do I resolve this? Here's my code below: Thanks...
SmtpClient client = new SmtpClient();
client.Host = "smtp.gmail.com";
client.Port = 587;
client.EnableSsl = true;
client.Credentials = new System.Net.NetworkCredential(#"myemailaddress#gmail.com",#"myemailpassword");
// create message
MailMessage message = new MailMessage();
message.From = new MailAddress(TextBox4.Text);
message.To.Add(new MailAddress(TextBox1.Text));
message.Subject = TextBox2.Text;
message.Body = TextBox3.Text; //body of the message to be sent
message.BodyEncoding = System.Text.Encoding.UTF8;
message.IsBodyHtml = true;
// message.Subject = "subject";
message.SubjectEncoding = System.Text.Encoding.UTF8;
try
{
client.Send(message);
Page.ClientScript.RegisterClientScriptBlock(typeof(Page), "Alert", "alert('Mail has been successfully sent!')", true);
}
catch (SmtpException ex)
{
Response.Write(ex.Message);
}
finally
{
// Clean up.
message.Dispose();
}
Just Go here : Less secure apps , Log on using your Email and Password which use for sending mail in your c# code , and choose Turn On.
Also please go to this link and click on Continue Allow access to your Google account
also I edit it little bit :
public string sendit(string ReciverMail)
{
MailMessage msg = new MailMessage();
msg.From = new MailAddress("YourMail#gmail.com");
msg.To.Add(ReciverMail);
msg.Subject = "Hello world! " + DateTime.Now.ToString();
msg.Body = "hi to you ... :)";
SmtpClient client = new SmtpClient();
client.UseDefaultCredentials = true;
client.Host = "smtp.gmail.com";
client.Port = 587;
client.EnableSsl = true;
client.DeliveryMethod = SmtpDeliveryMethod.Network;
client.Credentials = new NetworkCredential("YourMail#gmail.com", "YourPassword");
client.Timeout = 20000;
try
{
client.Send(msg);
return "Mail has been successfully sent!";
}
catch (Exception ex)
{
return "Fail Has error" + ex.Message;
}
finally
{
msg.Dispose();
}
}
For some reason my program does not send email using SMTP server, it stops somewhere in this code, and I can't debug it, because it happens with the compiled .exe
public static void sendLog(MailMessage mail) {
SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
mail.From = new MailAddress(Constants.EMAIL_SENDER);
mail.To.Add(Constants.EMAIL_RECEIVER);
mail.Subject = Environment.UserName;
SmtpServer.Port = 587;
SmtpServer.Credentials = new NetworkCredential(Constants.EMAIL_SENDER, Constants.EMAIL_SENDER_PASSWORD);
SmtpServer.EnableSsl = true;
SmtpServer.Send(mail);
}
what I need is to know what try/catch to use, and to handle the proper Exception to write in a .txt file?
You should use proper SMTP Exception
catch (SmtpException ex)
{
// write to log file
string msg = "Failure sending email"+ex.Message+" "+ex.StackTrace;
}
I've been making a Real Time Modding Tool for Call of Duty and am trying to make a report bug system, but I'm getting this error:
the codes that I'm using for this are as follows:
private void button4_Click(object sender, EventArgs e)
{
// Create the mail message
MailMessage mail = new MailMessage();
// Set The Addresses
mail.From = new MailAddress("brinkerzbhtests#gmail.com");
mail.To.Add("brinkerzbhtests#gmail.com");
// Login to that email
// Set The Content
mail.Subject = "RTM Tool Bug";
mail.Body = textBox1.Text;
// Send The Message
SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);
NetworkCredential info = new NetworkCredential("brinkerzbhtests#gmail.com", "PasswordNotBeingGivenHere");
smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
smtp.EnableSsl = true;
try
{
smtp.Send(mail);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
Picture of full help screen:
NetworkCredential info = new NetworkCredential("brinkerzbhtests#gmail.com", "PasswordNotBeingGivenHere");
smtp.Credentials =info ; // add this line
You create your network credentials and don't associate them with the smtp client.
Try adding the line:
smtp.Credentials = Info;