how to find the SMTP host name?

Question

1.80/5 (2 votes)

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SQL-Server-2005

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hi...
i got a code for send email to mail...
but i dint know how to give the smtphost name...

System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient("yoursmtphost");

can u say how to do this ?

Posted 8-Nov-11 22:09pm

Raghupathiraja

Updated 8-Nov-11 22:18pm

sravani.v

v2

Add a Solution

8 solutions

Solution 7

Read this:
Send Email from Yahoo, Gmail, Hotmail (C#)[^]

Posted 5-Jan-13 5:09am

adriancs

Solution 6

System.Net.Mail.SmtpException: Failure sending mail. ---> System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it 173.194.79.108:587
at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)
--- End of inner exception stack trace ---
at System.Net.ServicePoint.GetConnection(PooledStream PooledStream, Object owner, Boolean async, IPAddress& address, Socket& abortSocket, Socket& abortSocket6)
at System.Net.PooledStream.Activate(Object owningObject, Boolean async, GeneralAsyncDelegate asyncCallback)
at System.Net.PooledStream.Activate(Object owningObject, GeneralAsyncDelegate asyncCallback)
at System.Net.ConnectionPool.GetConnection(Object owningObject, GeneralAsyncDelegate asyncCallback, Int32 creationTimeout)
at System.Net.Mail.SmtpConnection.GetConnection(ServicePoint servicePoint)
at System.Net.Mail.SmtpTransport.GetConnection(ServicePoint servicePoint)
at System.Net.Mail.SmtpClient.GetConnection()
at System.Net.Mail.SmtpClient.Send(MailMessage message)
--- End of inner exception stack trace ---
at System.Net.Mail.SmtpClient.Send(MailMessage message)
at WindowsFormsApplication2.Form1.button1_Click(Object sender, EventArgs e) in C:\Users\jagan\Desktop\WindowsFormsApplication2\WindowsFormsApplication2\Form1.cs:line 33

that is the error i got//

my code was---

MailMessage mail = new MailMessage();
SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");

mail.From = new MailAddress("ait90510@gmail.com");

mail.To.Add("mail.at100@gmail.com");
mail.Subject = "Name of subject";

mail.Body = "mail with attachment";

SmtpServer.Port = 587;
SmtpServer.Credentials = new System.Net.NetworkCredential("myuserid", "password");
SmtpServer.Send(mail);

Anybody Please Help...................................................................

my id =mail.amit100@gmail.com

Posted 4-Jan-13 23:26pm

a90150

Solution 8

Hope this will help...

Open your Command Prompt and type

"nslookup" and press Enter

it will show you your server name with the server address.

Thank you.

Posted 4-Sep-13 1:30am

mdsajidfaizan

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P.Salini · Accepted Answer · 2011-11-08T22:19:00

Solution 2

See this

How to send email through asp.net[^]

EDIT --->

To send email you need one host. If your company is having such configured host then ask concerned person for host address and credentials.

If you dont have any such own host then you can use gmail host server.
to send mail using gmail server check the above link

Posted 8-Nov-11 22:19pm

P.Salini

Updated 8-Nov-11 22:34pm

v2

Comments

Raghupathiraja 9-Nov-11 5:59am

i am gets error in smpt server connection only...

OriginalGriff · Accepted Answer · 2011-11-08T22:22:00

Solution 3

Literally give the SMTP Host name: the outgoing mail server reference you would put into an outlook account setup:

C#

System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient("smtp.talktalk.net");

"i used this code..."

C#

System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage();
message.To.Add("training@bellatrix.in");
message.Subject = "This is the Subject line";
message.From = new System.Net.Mail.MailAddress("raghupathirajamca@gmail.com");
message.Body = "hi";
System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient("smtp.gmail.com");
smtp.Send(message);

"it showing error at last line ya"

The chances are that the error is actually caused because gmail want's authentication - it needs to know you are you, and not me trying to send messages from your account. This means you need to set the Credentials field.

Have a look at this tip: it contains a generic email routine: Sending an Email in C# with or without attachments: generic routine.[^]

Posted 8-Nov-11 22:22pm

OriginalGriff

Updated 8-Nov-11 23:00pm

v2

Comments

Raghupathiraja 9-Nov-11 4:26am

i dont know exactly what to do?
can u say ?

OriginalGriff 9-Nov-11 4:35am

No! :laugh:
I do not know what EMail server you are using, so I cannot even give you a clue.
You need to see if the email provider you are using provides FAQ, or sent you an email at some point. They don't exactly hide this information!

Raghupathiraja 9-Nov-11 4:50am

System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage();
message.To.Add("training@bellatrix.in");
message.Subject = "This is the Subject line";
message.From = new System.Net.Mail.MailAddress("raghupathirajamca@gmail.com");
message.Body = "hi";
System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient("smtp.gmail.com");
smtp.Send(message);
i used this code...
it showing error at last line ya

OriginalGriff 9-Nov-11 5:00am

Answer updated

Raghupathiraja 9-Nov-11 5:03am

thanks ya...

Khan Sarfraz 9-Nov-11 5:17am

from django.core.mail import send_mail, BadHeaderError

def send_email(request):
subject = request.POST.get('subject', '')
message = request.POST.get('message', '')
from_email = request.POST.get('from_email', '')
if subject and message and from_email:
try:
send_mail(subject, message, from_email, ['admin@example.com'])
except BadHeaderError:
return HttpResponse('Invalid header found.')
return HttpResponseRedirect('/contact/thanks/')
else:
# In reality we'd use a form class
# to get proper validation errors.
return HttpResponse('Make sure all fields are entered and valid.')

Khan Sarfraz 9-Nov-11 5:22am

private void Page_Load(object sender, System.EventArgs e)
{
MailMessage mail = new MailMessage();
mail.To = "me@mycompany.com";
mail.From = "you@yourcompany.com";
mail.Subject = "this is a test email.";
mail.Body = "Some text goes here";
mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1"); //basic authentication
mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", "my_username_here"); //set your username here
mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", "super_secret"); //set your password here

SmtpMail.SmtpServer = "mail.mycompany.com"; //your real server goes here
SmtpMail.Send( mail );
}

Khan Sarfraz 9-Nov-11 5:23am

System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage();
message.To.Add("training@bellatrix.in");
message.Subject = "This is the Subject line";
message.From = new System.Net.Mail.MailAddress("raghupathirajamca@gmail.com");
message.Body = "hi";
System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient("smtp.gmail.com");
smtp.Send(message);
i used this code error got in last line

Raghupathiraja 9-Nov-11 5:57am

this is i posted knew?
can u answer for it?

Raghupathiraja 9-Nov-11 6:14am

protected void Button1_Click(object sender, EventArgs e)
{
System.Net.Mail.MailMessage msg = new System.Net.Mail.MailMessage(TextBox1.Text, TextBox2.Text, TextBox3.Text, TextBox4.Text);

System.Net.Mail.SmtpClient mysmtp = new SmtpClient("192.168.1.9");
try
{
mysmtp.Send(msg);
Label1.Text = "mail sent";
}
catch (Exception ex)
{
Label1.Text = ex.Message;
}
}
i used this also...
its showing failed mail sending

sravani.v · Accepted Answer · 2011-11-08T22:32:00

Solution 4

If you are sending mail through gmail
use "smtp.gmail.com" as host

Posted 8-Nov-11 22:32pm

sravani.v

Comments

Raghupathiraja 9-Nov-11 4:34am

is it enough ah?
thank u

Raghupathiraja 9-Nov-11 4:51am

System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage();
message.To.Add("training@bellatrix.in");
message.Subject = "This is the Subject line";
message.From = new System.Net.Mail.MailAddress("raghupathirajamca@gmail.com");
message.Body = "hi";
System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient("smtp.gmail.com");
smtp.Send(message);
i used this code error got in last line

Raghupathiraja 9-Nov-11 4:54am

"The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Must issue a STARTTLS command first. lt8sm11626059pbb.0 "
got this error when i click the button

member60 9-Nov-11 5:04am

check the solution i have sugested

Raghupathiraja 9-Nov-11 5:13am

in my code where i want to give this line...
dont mistaken...

Member 11144052 11-Oct-14 16:31pm

plz send solution makbuldon@gmail.com

member60 · Accepted Answer · 2011-11-08T23:04:00

Solution 5

you have to set the EnableSSl to True before you set the NetWork Credentials of your SMTP client. as:

C#

SmtpClient.EnableSsl = True

Posted 8-Nov-11 23:04pm

member60

Updated 8-Nov-11 23:05pm

v2

Richard MacCutchan · Accepted Answer · 2011-11-08T22:14:00

Solution 1

Exactly as you have shown above, and is described here[^]. However, you need to know the host name in advance, since the software cannot guess which host you are allowed to use.

Posted 8-Nov-11 22:14pm

Richard MacCutchan

Comments

Raghupathiraja 9-Nov-11 4:19am

how to know the host name?
how to find it?
can u say yar?

Richard MacCutchan 9-Nov-11 4:40am

Ask your service provider; how else can you find it?

Dave Quecke 16-Jan-16 22:57pm

Isn't there a default I can find on most machines?

Richard MacCutchan 17-Jan-16 2:57am

No, your SMTP hostname is given by the email provider.

Dave Quecke 17-Jan-16 12:09pm

But assuming the client machine has email service already and was already given the hostname, can't I find it somewhere on the machine programatically?

Richard MacCutchan 17-Jan-16 12:35pm

Well I guess you could use one of the network calls to see who is listening on any of the commonly used ports for email. however, very few client PCs have SMTP servers running on them. Most people use one of the commonly available sevices from people like Google, Yahoo, Miscrosoft etc.