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Windows Server 2000/2003 Thread, A socket operation was attempted to an unreachable network 69.28.206.212:25 in Technical; Hi, I am trying to use the SMS service provided by a SMS provider to send SMS from my application ...
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    A socket operation was attempted to an unreachable network 69.28.206.212:25

    Hi,

    I am trying to use the SMS service provided by a SMS provider to send SMS from my application to mobile phone. However, the error existed "A socket operation was attempted to an unreachable network 69.28.206.212:25".

    The code used is as follow:

    protected void Submit_Click(object sender, EventArgs e)
    {
    SmtpClient client = new SmtpClient("smtp.ipipi.com");
    client.Credentials = new NetworkCredential("useraccount", "password");
    client.Send("useraccount@smtp.ipipi.com", "+phonenumber@sms.ipipi.com", "", "Your Message");
    }

    Could anyone give me any advice?

    Thanks a lot!

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    Like your mail server problem this again appears to be a firewall issue accessing a remote TCP25.

    For your info; I have tested that server and it works fine.

    telnet 69.28.206.212 25
    Trying 69.28.206.212...
    Connected to 69.28.206.212.
    Escape character is '^]'.
    220 ipipi.com SMTP Server (JAMES SMTP Server 2.3.0) ready Wed, 18 Mar 2009 23:28:41 -0700 (PDT)
    ^]
    telnet> quit
    Connection closed

  3. Thanks to kmount from:

    amychow (19th March 2009)

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    Quote Originally Posted by kmount View Post
    Like your mail server problem this again appears to be a firewall issue accessing a remote TCP25.

    For your info; I have tested that server and it works fine.
    How can I configure the firewall that it can access a remote TCP 25?

    Thanks!

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    It depends upon whether the firewall is a hardware or software device and whether you have control of it. (It might be a block upstream you see...)

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    Quote Originally Posted by kmount View Post
    It depends upon whether the firewall is a hardware or software device and whether you have control of it. (It might be a block upstream you see...)

    I have turn off the windows firewall and still not work.

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    Ok, how are you connected to the internet? (Is this at work I assume?).

    Have you contacted your provider and had confirmation that TCP Port 25 is allowed outbound to this destination?

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    Quote Originally Posted by kmount View Post
    Ok, how are you connected to the internet? (Is this at work I assume?).



    Have you contacted your provider and had confirmation that TCP Port 25 is allowed outbound to this destination?
    No, this is at school.

    I have contacted the SMS service provider and waiting for response.

    For my SMTP virtual server, when I first configured the SMTP server, I can send email to outside. But I don't know why after a period, I cannot send email to outside. Maybe I made some modification after that.
    Last edited by amychow; 19th March 2009 at 08:17 AM.

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    Quote Originally Posted by kmount View Post
    Ok, how are you connected to the internet? (Is this at work I assume?).

    Have you contacted your provider and had confirmation that TCP Port 25 is allowed outbound to this destination?
    Would a router affect this ? maybe going into the routers configuration and making sure that the above port is not blocked ? Not sure as obviously my netgear allows all out going traffic but not sure if that was by default or not.

  10. Thanks to mac_shinobi from:

    amychow (19th March 2009)

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    Yep, could be the router but more likely the upstream ISP.

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    mac_shinobi's Avatar
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    Quote Originally Posted by kmount View Post
    Yep, could be the router but more likely the upstream ISP.
    Wasn't debating that

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    I know, I was agreeing with you Shane.

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    Thanks everyone who gave comment here.

    I may try to use another email server.

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    If you can't connect out on 25 no matter what you use it won't help! (Unless you can get out on a different port).

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    So who provides your internet connection? If its through your LEA they will need to know to allow the traffic....

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    Quote Originally Posted by kmount View Post
    I know, I was agreeing with you Shane.

    ooopppsss - sorry

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