Send an e-mail from gmail.

Question

0.00/5 (No votes)

See more:

Hello everyone.

I had a problem when I am going to send an e-mail.

I have the following code:

C#

this.m_oSmtpCliente.Host = this.m_sSMTPSERVER;
this.m_oSmtpCliente.Port = 587;
this.m_oSmtpCliente.EnableSsl = true;
this.m_oSmtpCliente.DeliveryMethod = SmtpDeliveryMethod.Network;
this.m_oSmtpCliente.UseDefaultCredentials = false;
this.m_oSmtpCliente.Credentials = new System.Net.NetworkCredential(this.m_sUser, this.m_sPass);

this.m_oSmtpCliente.Send(oMessage);

When I execute the last line. I crash and give me the following error:

C#

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 209.85.229.109:587
at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)\r\n   at System.Net.Sockets.Socket.InternalConnect(EndPoint remoteEP)\r\n   at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Int32 timeout, Exception& exception)

I don´t know what happend. I view a lot of codes and I was the same things.

Thank you very much.

Posted 26-Oct-11 3:08am

MiguelSanchezCuarental

Add a Solution

Comments

Henning Dieterichs 26-Oct-11 9:23am

Which host do you use? "google.com" (which is wrong) or "smtp.google.com" (which should work)?

MiguelSanchezCuarental 26-Oct-11 9:29am

No. I use smtp.gmail.com
I try using smtp.google.com, but it doesn´t work either.

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Manfred Rudolf Bihy · Answer 1 · 2011-10-26T03:27:00

Solution 1

A reverse lookup revealed that the IP you gave resolves to the FQDN ww-in-f109.1e100.net. Is this a machine on your network?
To check if the machine is reachable you can try to ping it. This only gives reliable information if ICMP is enabled in your network up to the machine you are trying to reach. Another test only works if there is a web server installed with at least on site enabled and bound to the above mentioned IP address. If the last statement is true you can try telnet 209.85.229.109 80. If the server is reachable from your computer the telnet command will connect.

If a telnet connect from your computer to server at port 587 fails and you have access to the server you can try to do a telnet connect on the server side. If this works then you know that there is some firewall on the way from your computer to the server that is blocking port 587.

If the connect at port 587 also fails on the server side you know that there is no service running on that port.

Please investigate and leave your finding in comment to this post.
Cheers!

—MRB

Posted 26-Oct-11 3:27am

Manfred Rudolf Bihy

Updated 26-Oct-11 3:29am

v3

Comments

Henning Dieterichs 26-Oct-11 9:37am

If you are using Windows 7 (and I think Vista too) you have to enable the telnet-client or use putty ;)

Manfred Rudolf Bihy 26-Oct-11 9:58am

Yes, I just found that out. Our company migrated to Windows7 a couple of weeks ago and I tell you I'm really pi**ed off. I want my XP client back. ;(
Thank god, we do most of our development stuff on servers dedicated to this task.

MiguelSanchezCuarental 26-Oct-11 9:43am

I try to do it: "telnet telnet 209.85.229.109 80" and it doesn´t connect. But if I do ping to this ip, it received all the packets. What can i do?? What can I do for the server are reachable from my computer?

Manfred Rudolf Bihy 26-Oct-11 9:54am

The IP you have mentioned has nothin to do with smtp.gmail.com. If you use nslookup command with smtp.gmail.com as a parameter the resolved IP is 74.125.43.108. What do you get when you enter: nslookup smtp.gmail.com?

MiguelSanchezCuarental 26-Oct-11 10:08am

Sorry I change the ip of the post. This is the ip that it show when I wrote: nslookup smtp.gmail.com -> 74.125.65.108.
If I do telnet whit this ip and the port 25, it connect but I can´t use these port in mi program, because it show me the following error: "Server does not support secure connections"

Manfred Rudolf Bihy 26-Oct-11 10:21am

That is correct port 25 is the port for SMTP which does not support secure connections. The port for secure connections varies, so you have to make sure that you are using the correct port. You said you are trying to use 587. I'll check how it works on my side! :)

Cheers!

MiguelSanchezCuarental 27-Oct-11 4:01am

Hello.
I must have a problem in my network or my computer, because I try it in an other computer and network, and it work perfect.
Thanks

Manfred Rudolf Bihy 26-Oct-11 9:56am

"telnet telnet 209.85.229.109 80": There is one telnet to many in what you wrote here. Use: telnet <hostnameOrIP> <portNumber>.

Richard MacCutchan · Answer 2 · 2011-10-26T04:08:00

Solution 2

I have just tested this on my system and it works correctly. The only difference being that I did not specify a port number in the SMTP client. Why have you selected port 587 in your test, when the defaults are 25 for non-SSL and 465 for SSL type mail?

Posted 26-Oct-11 4:08am

Richard MacCutchan