Server Error in '/WebSite1' Application.

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I'm having this problem too .. did you find a solution?

Thanks!
mike123

What this error means is that System.net.mail was unable to find the smtp server.

The answer will vary depending on whether you have a fixed IP or a dynamic IP but,
basically, you need to assign a valid IP to your smtp server.

With fixed IP's this is relatively straightforward.
With dynamic IP's it takes a bit of tweaking.

Open the IIS Manager and check the properties for the smtp server.

In the Default SMTP Virtual Server's properties, in the "Access" tab,
in the Connection Control and Relay dialogs, make sure that your local IP is assigned.
( In my case, it's 10.0.0.2... )

You may also need to modify your hosts file, to point 127.0.0.1 to your machine name.
( \WINDOWS\system32\drivers\etc\hosts )

Then, in your code, assign your machine name to the smtp client :

Dim client As New SmtpClient("yourmachinename")
client.Send(mail)

I haven't found a solution yet.

when i find it,i'll let you know.

Ray 

Hi,it's me again,i did what you told me and i overcame the former message,

In my code i assigned my machine name as  administrator/Computos8,you know the username and machine name.

 and now i get the following message.

The remote name could not be resolved: 'administrator/Computos8.

Thank you.

Ray

Unable to read data from the transport connection: net_io_connectionclosed

What this error means is that System.net.mail was unable to find the smtp server.

The answer will vary depending on whether you have a fixed IP or a dynamic IP but,
basically, you need to assign a valid IP to your smtp server.

With fixed IP's this is relatively straightforward.
With dynamic IP's it takes a bit of tweaking.

Open the IIS Manager and check the properties for the smtp server.

In the Default SMTP Virtual Server's properties, in the "Access" tab,
in the Connection Control and Relay dialogs, make sure that your local IP is assigned.
( In my case, it's 10.0.0.2... )

You may also need to modify your hosts file, to point 127.0.0.1 to your machine name.
( \WINDOWS\system32\drivers\etc\hosts )

Then, in your code, assign your machine name to the smtp client :

Dim client As New SmtpClient("yourmachinename")
client.Send(mail)

The error usually happens when the smtp server does not recognize the email address in the "from" field. Make sure you set the "from" with an email address that actualy exists in your smtp server.

See code below for an example, note how the email server used in the email of the "from" field is the same as the one specified as the smtp server:

Dim from As String = "me@youremailserver.com"

Dim recipientEmail As String = "someone@someamailserver.com"

hi i am also facing the same problem

 i am using the password recovery control in my aspx page

My Web.config

<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">

<add name="defaultConnectionString" connectionString="Data Source=vitws-10;Initial Catalog=jobstarter;User ID=sa;Connect Timeout=200" />

</connectionStrings>

<pages theme="Default">

<compilation debug="true">

<add assembly="System.Data, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>

<add assembly="System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>

</assemblies>

<forms name=".ASPXAUTH" loginUrl="~/default.aspx"></forms>

<membership defaultProvider="MyProvider">

description="" requiresUniqueEmail="true" enablePasswordRetrieval="false" minRequiredPasswordLength="4"

enablePasswordReset="true" requiresQuestionAndAnswer="true" passwordFormat="Hashed"

</providers>

<system.net>

<smtp from="sales@pingjob.com">

</smtp>

</system.net>

<add key="DBConn" value="Data Source=vitws-10;Database=jobstarter; User ID=sa;password=;"/>

<add key="numberToShow" value="20" />

</configuration>

VITWS-10 is my server.. please help me..

This is an SMTP Virtual server issue, load up IIS and

• Right click Default SMTP Virtual server.
• Change IP address to All Unassigned

This should work..

I am also getting this problem but randomnly and I cannot figure out what is going on. The IP address of the mail server is fixed. The machine running the web application does not have SMTP installed. The email addresses are valid and the email server is setup to allow the relay to take place. Any other possibilities I am not looking at?

i also have the same problem.  after i tried all the suggestions, i now get this error message:

The remote name could not be resolved:

 Thanks man this helped me out a lot!

Erik

Thanks a lot.

 Assigning a static IP solved the problem

rvidal:

Unable to read data from the transport connection: net_io_connectionclosed

What this error means is that System.net.mail was unable to find the smtp server.

The answer will vary depending on whether you have a fixed IP or a dynamic IP but,
basically, you need to assign a valid IP to your smtp server.

With fixed IP's this is relatively straightforward.
With dynamic IP's it takes a bit of tweaking.

Open the IIS Manager and check the properties for the smtp server.

In the Default SMTP Virtual Server's properties, in the "Access" tab,
in the Connection Control and Relay dialogs, make sure that your local IP is assigned.
( In my case, it's 10.0.0.2... )

You may also need to modify your hosts file, to point 127.0.0.1 to your machine name.
( \WINDOWS\system32\drivers\etc\hosts )

Then, in your code, assign your machine name to the smtp client :

Dim client As New SmtpClient("yourmachinename")
client.Send(mail)

 

Tried all the solutions above, and they don't fix this. The problem is that the connection to the mailserver isn't closed properly. It times out at the mailserver, then the .net connection (with or without pooling) on the webserver times out from being idle too long. We've had all sorts of random errors, all relating down to the same re-use problem of the smtpClient pooling. The actual problem is that there is no proper way to close the connection once you're done.

Set SmtpClient.ServicePoint.MaxIdleTime = 1; according to supported work-around: http://connect.microsoft.com/VisualStudio/feedback/Workaround.aspx?FeedbackID=146711 which makes all smtp work properly.

Here's a complete sample: Njoy / Peter

MailMessage msgMail = new MailMessage();
msgMail.To.Add(new MailAddress("info@somedomain.se"));
msgMail.Subject = "Message from web";
msgMail.IsBodyHtml = true;
msgMail.Body = "Test message";
SmtpClient Client = new SmtpClient();  /* uses settings form web.config */
Client.ServicePoint.MaxIdleTime = 1; /* without this the connection is idle too long and not terminated, times out at the server and gives sequencing errors */
Client.Send(msgMail);
msgMail.Dispose();