email validation by their server name in c#

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hi everyone;
Currently i am working on window application like outlook, for sending,receiving email. using pop3 server and smtp.

in this project I have a form which have four text fields these are:
1 txtEmail,
2 txtpassword,
3 txtpopserveraddress.
4 txtSSLport
i want that when user enter their email in "txtemail" like user@gmail.com then pop server address and SSL port automatically set their own text fields like in pop server address text field=pop.gmail.com and SSL port text fields=995; and similarly for yahoo,hotmail and so on... how it will done? please guide me about as soon as possible?

I really appreciate your answer.

thanks in advance!

Posted 7-Apr-14 3:57am

Wajid Khaksar

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Richard MacCutchan 7-Apr-14 12:25pm

Add an event handler that checks the contents of the textbox for a valid email address. When the address is valid then you can fill in the details in the other boxes.

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Er. Puneet Goel · Answer 1 · 2014-04-07T20:27:00

Add this event:

C#

private void textBox1_TextChanged(object sender, EventArgs e)
    {
        //
        // This changes the main window text when you type into the TextBox.
        //
        this.Text = textBox1.Text;
    }

In this event add email validation and on valid case fetch the required details and display to other SSl like textbox