I have a function that uses CDO to send emails with request to have a delivery receipt when the mail reacehes the recepient.
I use the following code:
CDO.Message msg = new CDO.Message();
CDO.Configuration conf = new CDO.Configuration();
conf.Fields["http://schemas.microsoft.com/cdo/configuration/smtpauthenticate"].Value = 1;
conf.Fields["http://schemas.microsoft.com/cdo/configuration/smtpserver"].Value = txtHost.Text;
conf.Fields["http://schemas.microsoft.com/cdo/configuration/smtpserverport"].Value = 25;
conf.Fields["http://schemas.microsoft.com/cdo/configuration/sendpassword"].Value = txtPass.Text;
conf.Fields["http://schemas.microsoft.com/cdo/configuration/sendusername"].Value = txtUser.Text;
conf.Fields.Update();
msg.Configuration = conf;
msg.To = txtTo.Text;
msg.From = txtFrom.Text;
msg.Subject = txtSubject.Text+" " + DateTime.Now;
msg.HTMLBody = txtBody.Text;
msg.BodyPart.Charset = "utf-8";
msg.DSNOptions = CdoDSNOptions.cdoDSNSuccessFailOrDelay;
msg.Fields.Update();
msg.Send();
Now this works fine on my local machine with my web server, but when used in the production server with another mail server the delivery receipts were not received.
I believe there must be a difference between my mail server and the production mail server but I don't know what it can be exactly.
So please if anybody has faced such a problem before, tell me what to do.
It works on your local machine almost by accident because you're delivering it to yourself. To work out in the world you have to explicitly tell CDO not to deliver to the local smtp for relaying by specifying sendUsingPort
conf.Fields["ttp://schemas.microsoft.com/cdo/configuration/sendusing"].Value = 2
Related
I am trying to use the google analytics apis v3 to embed the analytics graph to my website using Certificate file. I got it to work on the local machine but when I deploy the code to my web server it produces this error:
The remote server returned an error: (400) Bad Request.
Does anyone know what is causing this error message and why I can't get the google graph on my production website?
Here is the code that is working on my local machine:
string scope = AnalyticsService.Scopes.AnalyticsReadonly.GetStringValue(),
x509Certificate2File = HttpContext.Current.Server.MapPath("~/App_Data/privatekey.p12"),
x509Certificate2FilePassword = "notasecret",
serviceAccountId = "xxxxxxx#developer.gserviceaccount.com",
profileId = "ga:xxxxxxxx",
startDate = "2013-10-06",
endDate = "2013-11-07";
AuthorizationServerDescription desc = GoogleAuthenticationServer.Description;
X509Certificate2 key = new X509Certificate2(x509Certificate2File, x509Certificate2FilePassword, X509KeyStorageFlags.Exportable);
AssertionFlowClient client = new AssertionFlowClient(desc, key) { ServiceAccountId = serviceAccountId, Scope = scope };
OAuth2Authenticator<AssertionFlowClient> auth = new OAuth2Authenticator<AssertionFlowClient>(client, AssertionFlowClient.GetState);
AnalyticsService gas = new AnalyticsService(new BaseClientService.Initializer() { Authenticator = auth });
DataResource.GaResource.GetRequest request = gas.Data.Ga.Get(profileId, startDate, endDate, "ga:visits");
request.Dimensions = "ga:day";
request.MaxResults = 10;
/* error 400 occur here on the production */
Google.Apis.Analytics.v3.Data.GaData data = request.Execute();
Thanks
There is only one possibility and without looking at the code you're going to have to chase it down; one of the paths are wrong and needs to be changed. This could be in the form of an IP address as well when I say "path" as you are calling something that is not there. It worked fine on your local machine (correct path) and it gave a 400 on the remote one (bad request) as in calling the wrong place.
I am getting this error while sending email from my application. Can anyone suggest any solution.
Service not available, closing transmission channel. The server
response was: 4.3.2 Service not available, closing transmission
channel
Below is code.
string adminID = "AAA#tu.edu";
MailMessage msg = new MailMessage();
msg.From = new MailAddress(adminID);
msg.To.Add("BBB#ttu.edu");
msg.Subject = "Sample Email";
msg.Body = "Hello ";
SmtpClient SmtpMail = new SmtpClient();
SmtpMail.Host = "basic.smtp.ttu.edu";
SmtpMail.Port = 25;
SmtpMail.Send(msg);
Got the solution for the issue. The Server was rejecting the request because this application didn't have write rights on that server. The code was perfectly fine, just it was permissions problem. Hope this helps someone!
Please check whether the server which is sending the e-mail is whitelisted on the SMTP server or Exchange server.
I had the same issue and whitelisting it on SMTP server resolved my issue.
I am developing a vehicle tracking system which uses GPS/GPRS/GSM. The tracking device I am currently using is GV100, a GPS/GPRS/GSM tracker from Quectel ([www.quectel.com][1].)
I am not able to establish connection between the device and the backend server. My question particularly is:
How do I send commands (AT Commands) to the device from the server?
How do I accept the response (reports and acknowledgement messages) from the device to save it in the database?
I sent command to the device with the MGV100 Manage Tool (Software provided by Quectel) via serial port. And I got acknowledgement SMS message on GSM enabled mobile telephone. Now, I want to send message from the server and accept reply on the server (not by SMS). I don’t know how to send command and receive the reply. I have no previous experience in developing such systems.
It would be great if I can get a sample code and setup procedures if it requires.
Where can I get a relevant tutorial for the case I mentioned?
Thanks jhonkola
To understand how server receives and send data to the device, I decided to first implement the communication between the client (currently my PC) and server. Though my ultimate goal is communicating with the device, currently I am trying to establish connection from my PC to the server. If I succeed in this, I will strive to communicate to server from the device which needs IP address and port number of server to send and receive data.
This is my assumption how to do it:
I can open a port on the server from .cs code so as to communicate
using TCP/UDP.
Client then can send and receive data via this
port.
I can save the data sent from the client on server's file
system and review it any time. (Am not storing the data in relational database because I don't want to bother about database issues now.)
This is how I tried to implement:
Server a C# Web Application:
When a button is clicked it opens a port and listens to client
protected void btnConnect_Click(object sender, EventArgs e)
{
try
{
continueListening = true;
while (continueListening)
{
int port=Int32.Parse(txtPort.Text);
lblOutput.Text = "Port is now " + port +". Waiting for connection";
TcpListener myList = new TcpListener(IPAddress.Parse(txtIpAddress.Text), port);
myList.Start();
Socket s = myList.AcceptSocket();
lblOutput.Text="Connection accepted from " + s.RemoteEndPoint;
byte[] b = new byte[100];
int k = s.Receive(b);
lblOutput.Text = ("Recieved...");
String obtainedText = "";
for (int i = 0; i < k; i++)
{
obtainedText = obtainedText + " " + (Convert.ToChar(b[i]));
}
writeToTextFile("C:/Users/MekAtIbex/Desktop/TESTED/RECIEVED.txt", obtainedText);
lblOutput.Text = obtainedText;
ASCIIEncoding asen = new ASCIIEncoding();
lblOutput.Text = lblOutput.Text +" "+ ("The string was recieved by the server.");
lblOutput.Text = lblOutput.Text +" "+ ("\r\nSent Acknowledgement");
}
Client: C# Windows application
private void btnSend_Click(object sender, EventArgs e)
{
try
{
TcpClient tcpClient = new TcpClient();
int port=Int32.Parse(txtPort.Text.Trim());
tcpClient.Connect(txtIpAddress.Text, port);
lblStatus.Text = ("Connected");
Stream stm = tcpClient.GetStream();
ASCIIEncoding asen = new ASCIIEncoding();
byte[] bytesToSend = asen.GetBytes(txtData.Text);
lblStatus.Text = ("Transmitting.....");
stm.Write(bytesToSend, 0, bytesToSend.Length);
byte[] bb = new byte[100];
int k = stm.Read(bb, 0, 100);
for (int i = 0; i < k; i++)
{
txtaResponse.Text = txtaResponse.Text + "\n" + "Res... " + new DateTime() + " " + Convert.ToChar(bb[i]);
Console.Write(Convert.ToChar(bb[i]));
}
tcpClient.Close();
}
catch (Exception ex)
{
lblStatus.Text = ("Connected");
txtaRequest.Text = txtaRequest.Text + "\n" + "Err... " + new DateTime() + " " + ex.StackTrace;
}
}
My current questions are:
Is my assumption correct? If not how should I do it?
I have tried to save it using the above code but I didn't got the file.
What is the advantage and disadvantage of using UDP in comparison TCP for tracking applications?
I have browsed well, but I couldn't find a place for a good start. And, as I have no experience in such applications, I couldn't debug my application.
My current questions are:
Is my assumption correct? If not how should I do it?
Yes, your basic assumptions are correct. The server would open a listening port and then the client could connect to this port and drop off data as needed. You can have the server log this to a file for later review too.
I have tried to save it using the above code but I didn't got the
file.
Is the file already created? The method you have will fail if the file is not existent on the system.
What is the advantage and disadvantage of using UDP in comparison TCP
for tracking applications?
UPD is less expensive in terms of network setup. It is the "fast and dirty" method of communication. The downside is that you may not get every message properly delivered. In some applications, this just doesn't matter and the benefits are worth this cost.
Now a few things I'd change:
Change IPAddress.Parse(txtIpAddress.Text) to IPAddress.Any
This will allow your listener the broadest ability to catch incoming messages and will most likely not effect other systems (since this is essentially your first networking program).
You'll also want to make your listener spawn a thread to handle the file writing and then go back to listening. This is a very standard practice and allows for servers to handle multiple connections.
It is difficult to comprehensively answer this, as a good answer would require detailed knowledge about the product. I suggest that you contact the manufacturer / reseller for support.
A few general points:
Sending commands over network to the device requires that you are able to connect to the device from internet. This is not always easy over GSM network, as the operators may block all incoming traffic. The manufacturer may have provided solutions for this.
If you can connect to the device, the protocol that is used to give commands (assuming that such protocol is built-in) will also contain a mechanism to receive any responses.
I am truing to integrate fusemail in asp.net 2.0. I am using HttpWebRequest for requesting the API pages. It has recently come to my notice that HttpWebRequest fails the first time and then continues and subsequent requests succeed.
say ( i know if i use goto it is a bad programming approach) if i use this code
retry:
try
{
Uri uri = new Uri("http://www.fusemail.com/api/request.html");
if (uri.Scheme == Uri.UriSchemeHttp)
{
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(uri);
request.PreAuthenticate = true;
request.Method =
WebRequestMethods.Http.Post;
//request.ReadWriteTimeout = System.Threading.Timeout.Infinite;
//request.Timeout = System.Threading.Timeout.Infinite;
request.ContentLength = data.Length;
request.ContentType =
"application/x-www-form-urlencoded";
//request.UserAgent = Request.UserAgent;
request.UserAgent = "Mozilla/4.0";
request.KeepAlive = false;
request.ServicePoint.Expect100Continue = true;
//request.Accept = "Accept: text/html,application/xhtml+xml,application/xml";
StreamWriter writer = new StreamWriter(request.GetRequestStream());
writer.Write(data);
writer.Close();
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream());
string tmp = reader.ReadToEnd();
response.Close();
//Response.Write(tmp);
if (!String.IsNullOrEmpty(tmp))
{
return tmp;
}
}
return String.Empty;
}
catch (WebException ex)
{
goto retry;
}
it works after failing once. i am writing to a text file in case of an error and after i failed request it works the second time. I am using ASP.Net 2.0 and the website is hosted on IIS 7 with Windows Server 2008 Standard. Also pinging the API address it fails the first time and then responds
C:\>ping 67.207.202.118
Pinging 67.207.202.118 with 32 bytes of data:
Reply from 192.168.0.253: **Destination host unreachable**.
Reply from 67.207.202.118: bytes=32 time=218ms TTL=49
Reply from 67.207.202.118: bytes=32 time=218ms TTL=49
Reply from 67.207.202.118: bytes=32 time=217ms TTL=49
Ping statistics for 67.207.202.118:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 217ms, Maximum = 218ms, Average = 217ms
The first time it fails in HttpWebRequest it fails with this error
System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 67.207.202.118:80
Is there an authentication issue the first time?. i read on some forums it first sends a 401 Unauthorized and then it can connect. I am unable to verify this using Fiddler.
Is there anything wrong with IIS configuration?
This is not a programming issue at all, I have faced a similar problem later and it was a network configuration problem due to ISA server / Firewall settings.
You have to contact your network administrator to check this issue.
I wish this helped you.
Yours,
Mohamed Kamal Elbeah
Senior .Net Developer
I recently came by this same issue. The solution in my case involved my testing environment, since I had multiple Ethernet adapters connected to my computer. While you may have a different IP for each of your Ethernet adapters, if they are all assigned to the same subnet this may cause a problem. The TCP connection is only attempted using one NIC at a time. So in my case, on the first try it would attempt the connection on one adapter that was not connected to my remote host, then on the second try it would connect using the second adapter which was connected. - Hope this helps someone.
//Create Mail Message Object with content that you want to send with mail.
System.Net.Mail.MailMessage MyMailMessage = new System.Net.Mail.MailMessage("dotnetguts#gmail.com", "myfriend#yahoo.com",
"This is the mail subject", "Just wanted to say Hello");
MyMailMessage.IsBodyHtml = false;
//Proper Authentication Details need to be passed when sending email from gmail
System.Net.NetworkCredential mailAuthentication = new
System.Net.NetworkCredential("dotnetguts#gmail.com", "myPassword");
//Smtp Mail server of Gmail is "smpt.gmail.com" and it uses port no. 587
//For different server like yahoo this details changes and you can
//get it from respective server.
System.Net.Mail.SmtpClient mailClient = new System.Net.Mail.SmtpClient("smtp.gmail.com", 587);
//Enable SSL
mailClient.EnableSsl = true;
mailClient.UseDefaultCredentials = false;
mailClient.Credentials = mailAuthentication;
mailClient.Send(MyMailMessage);
Thats my code & it throws error :
No connection could be made because the target machine actively refused it 72.14.213.109:587
Code Reference : here
Please tell me how can i sought it out ??
Check both of the following points
1- Check that this port 587 is open on your machine
2- Check if your antivirus is blocking the connection to your port
Regards.
If your have any antivirus software running, check the access protection, unblock "prevent mass mailing worms from send mail"
Did you actually change the username and password?