In the first part, in the GridView I made the Subject field of the Email as Hyperlink and which when clicked redirects the user to another page named ShowMessage.aspx which as the named suggests displays the complete email.
	 
	 
	
		HTML Markup
	
		Below is the HTML Markup of the ShowMessage.aspx page.
	
		
			<form id="form1" runat="server">
		
			    <div>
		
			        From: <asp:Label ID="lblFrom" runat="server" Text="" />
		
			        <br />
		
			        Subject: <asp:Label ID="lblSubject" runat="server" Text="" />
		
			        <br />
		
			        Body: <asp:Label ID="lblBody" runat="server" Text="" />
		
			    </div>
		
			</form>
	 
	
		 
	
		As you will notice the page is quite simple it has three labels to display.
	
		1. From Email.
	
		2. Subject of the email.
	
		3. Body of the email.
		  
		  
	
		Fetch and Display the message
	
		From the main page I pass the MessageNumber as parameter via QueryString to the ShowMessage page. Here based on the MessageNumber I am fetching the complete message using the following code snippet.
	
		C#
	
		
			protected void Page_Load(object sender, EventArgs e)
		
			{
		
			    if (!IsPostBack)
		
			    {
		
			        Pop3Client pop3Client = (Pop3Client)Session["Pop3Client"];
		
			        int messageNumber = int.Parse(Request.QueryString["MessageNumber"]);
		
			        Message message = pop3Client.GetMessage(messageNumber);
		
			        MessagePart messagePart = message.MessagePart.MessageParts[0];
		
			        lblFrom.Text = message.Headers.From.Address;
		
			        lblSubject.Text = message.Headers.Subject;
		
			        lblBody.Text = messagePart.BodyEncoding.GetString(messagePart.Body);
		
			    }
		
			}
	 
	
		 
	
		VB.Net
	
		
			Private Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
		
			   If Not IsPostBack Then
		
			       Dim pop3Client As Pop3Client = CType(Session("Pop3Client"), Pop3Client)
		
			       Dim messageNumber As Integer = Integer.Parse(Request.QueryString("MessageNumber"))
		
			       Dim message As Message = pop3Client.GetMessage(messageNumber)
		
			       Dim messagePart As MessagePart = message.MessagePart.MessageParts(0)
		
			       lblFrom.Text = message.Headers.From.Address
		
			       lblSubject.Text = message.Headers.Subject
		
			       lblBody.Text = messagePart.BodyEncoding.GetString(messagePart.Body)
		
			   End If
		
			End Sub
	 
	
		 
	
    
		 
	
		Screenshot
	
	 
	 
		 
		Downloads
	
		You can download the complete source code in VB.Net and C# using the link below.