Solved

No connection could be made because the target machine actively refused it ipadd:port at system.Net.sockets.Socket.doConnect

Posted on 2010-09-09
12
973 Views
Last Modified: 2012-05-10
Hi,

I am writing code to send  an email whenever my application has an unhandled error.

With this same code i could get it runnign on a gmail smtp server.

However, when i replaced these values wit hvalues for my smtp host, i am gettin the following error. Why am i getting this error?

I am getting the following error.System.Net.Mail.smtpException:Failure sending Mail.----->System.Net.WebException:Unable to connect to remote server---->System.Net.Sockets.socketException:No connection could be made because the target machine actively refused it ipadd:port at system.Net.sockets.Socket.doConnect


Here is my code.
Private Sub EmailTest(ByVal errorMsg As String)
    Dim SmtpServer As New SmtpClient()
    SmtpServer.Credentials = New Net.NetworkCredential("me@tremail.com", "test123")
    SmtpServer.Port = 22
    SmtpServer.Host = "smtp.myhost.com"
    SmtpServer.EnableSsl = True

    Dim mail As New MailMessage()

    Try
      mail.From = New MailAddress("me@tremail.com", "Web Developers", System.Text.Encoding.UTF8)
      mail.To.Add("target@tremail.com")
      mail.Subject = "Error Messages in Application"
      mail.Body = errorMsg
      
      SmtpServer.Send(mail)
    Catch ex As Exception
      MsgBox(ex.ToString())
    End Try

  End Sub

Open in new window

0
Comment
Question by:shahjagat
  • 6
  • 3
12 Comments
 
LVL 4

Expert Comment

by:sdrouins
ID: 33637833
look like your firewall is blocking the port your trying to connect to
0
 
LVL 11

Expert Comment

by:ladarling
ID: 33638080
This could be a firewall issue, it could also be a port issue. If the server is not setup for anonymous relay, it may be expecting  connections on an SSL port. Do you have access to the server configuration, and what mail system is it running?
0
 

Author Comment

by:shahjagat
ID: 33638229
Hi sdrouins and ladarling,

I am getting this issue now.
System.Security.Authentication.AuthenticationException:The Remote Certificate is Invalid According tothe validation procedure.

Thanks
0
Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.

 

Author Comment

by:shahjagat
ID: 33638421
ladarling:

The server is already set up for anonymous relay i guess as we have our outlook conencted to it.

what mail system is it running? - I am not sure what you mean by this.
Thanks
0
 
LVL 11

Accepted Solution

by:
ladarling earned 500 total points
ID: 33639661
If you are setup for anonymous relay, you dont need to use the credentials -or- SSL, and this is normally done on port 25 for exchange.
If you need a secure socket, exchange default is Port 443, and your client machine must have the SSL certificate for the server in the trusted certificates chain.
Below is a sample function that we user here.... Replace MyExchangeServer with your actual machine name or its IP address and fill in your own Email address in the from field and it should work.


    Public Shared Function SendMail(ByVal toRecipients() As String, ByVal messageSubject As String, ByVal messageText As String, Optional ByVal ccRecipients() As String = Nothing, Optional ByVal fileAttachments() As System.IO.FileInfo = Nothing) As Boolean

        Dim client As New SmtpClient("MyExchangeServer")
        Dim msg As New MailMessage
        With msg
            For Each s As String In toRecipients
                .To.Add(s)
            Next
            For Each s As String In ccRecipients
                .CC.Add(s)
            Next
            .Subject = messageSubject
            .Body = messageText
            .From = New MailAddress("me@mydomain.com")
            For Each a As IO.FileInfo In fileAttachments
                .Attachments.Add(New Net.Mail.Attachment(a.FullName))
            Next
        End With
        Try
            client.Send(msg)
        Catch ex As Exception
            MsgBox(ex.Message)
            Return False
        End Try
        Return True

    End Function

Open in new window

0
 
LVL 11

Expert Comment

by:ladarling
ID: 33640061
If you are -not- interacting with a Microsoft Exchange email server, you need to verify the SSL and Relay ports for your provider and investigate what kind of authentication is necessary (if it requires SSL, for example). If this is a third party server, you will most likely have to authenticate. Try using your code again, but setting
SmtpServer.UseDefaultCredentials = False
 
0
 

Author Comment

by:shahjagat
ID: 33640464
I am working on that - Have to contact them.
0
 

Author Comment

by:shahjagat
ID: 33640545
I am not using a microsft Exchange email server. We are using a 3rd party server.
0
 

Author Comment

by:shahjagat
ID: 33641965
Hi ladarling,

when i changed  the following from true to false, i am getting the mails.
SmtpServer.EnableSsl = False

Thanks
0
 

Author Comment

by:shahjagat
ID: 33663705
Hi ,  I do not see Mark As Answer buttons.

Please award  points to ladarling - Comment ID: 33639661

Thanks
0

Featured Post

Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Parsing a CSV file is a task that we are confronted with regularly, and although there are a vast number of means to do this, as a newbie, the field can be confusing and the tools can seem complex. A simple solution to parsing a customized CSV fi…
Calculating holidays and working days is a function that is often needed yet it is not one found within the Framework. This article presents one approach to building a working-day calculator for use in .NET.
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question