Import the following namespaces

Imports System.Net.Mail
Imports System.Net.Mail.SmtpClient
Imports System.Net.Mail.MailMessage


'Decalration part

    Private mMailServer As String
    Private mTo As String
    Private mFrom As String
    Private mMsg As String
    Private mSubject As String
    Private mPort As Integer
    Public flag As Integer = 0
    Dim a_file As String



Protected Sub btnsend_Click(ByVal sender As Object, ByVal e As    System.EventArgs) Handles btnsend.Click
  
  Try
  
'set the addresses
      mFrom = txtfrom.Text.Trim()
      mTo = Trim(txtto.Text)

	'set the content
mSubject = txtsubject.Text.Trim()
mMsg = txtmessage.Text

      mMailServer = "localhost"
      mPort = 25
Dim message As New System.Net.Mail.MailMessage(mFrom, mTo, mSubject, mMsg)
           
'*************************Send Attchment *************************'
         If FileUpload1.FileName <> "" Then

message.Attachments.Add(New Attachment(FileUpload1.PostedFile.InputStream, FileUpload1.FileName))

          Else
             lblmessage.Text = "Select Attachemnt!!!"
             Exit Sub
          End If
'--------------------------------------End----------------------------'

'*************************Send Inline Image ***********************'

         If FileUpload1.FileName <> "" Then
     

'create the Plain Text part
         Dim plainView As AlternateView = AlternateView.CreateAlternateViewFromString("", Nothing, "text/plain")

' create the Html part
'to embed images, we need to use the prefix 'cid' in the img src value
'the cid value will map to the Content-Id of a Linked resource.
'thus  will map to a LinkedResource with a ContentId of 'image'
                       
   Dim htmlView As AlternateView =  AlternateView.CreateAlternateViewFromString(".", Nothing, "text/html")

'select the image 
Dim at As New Attachment(FileUpload1.PostedFile.InputStream, FileUpload1.FileName)




'create LinkedResource (embedded image)   
Dim logo As New LinkedResource(FileUpload1.PostedFile.InputStream, "text/plain")
      logo.ContentId = "image"

'add the LinkedResource to the appropriate view
      htmlView.LinkedResources.Add(logo)

'add the views
      message.AlternateViews.Add(plainView)
      message.AlternateViews.Add(htmlView)
   
End if 

'--------------------------------------End----------------------------'

               
'******************************Send CC********************************'
 If txtbcc.Text <> "" Then
      message.Bcc.Add(txtbcc.Text.Trim())
 End If
'-------------------------------End-----------------------------------'

'******************************Send BCC*******************************'
 If txtcc.Text <> "" Then
      message.CC.Add(txtcc.Text.Trim())
 End If
 '-------------------------------End----------------------------------'
        

   'send the message
    Dim mySmtpClient As New SmtpClient(mMailServer, mPort)
    mySmtpClient.UseDefaultCredentials = True
    mySmtpClient.Host = "<”your ip address here”>"
    mySmtpClient.Send(message)
    clear()
    lblmessage.Text = "Mail has been sent Successfully !!!"

Catch ex As Exception
            lblmessage.Text = ex.Message
        End Try
End Sub







                     ************* Using c#***************



	
Import the follwing namespace

	Using System.Net.Mail
Using System.Net.Mail.SmtpClient
Using System.Net.Mail.MailMessage
	






Decalration

private string mMailServer; 
private string mTo; 
private string mFrom; 
private string mMsg; 
private string mSubject; 
private int mPort; 
public int flag = 0; 
string a_file;


protected void  btnsend_Click(object sender, System.EventArgs e) 
{ 
    	
    try { 
        
        //set the addresses 
        mFrom = txtfrom.Text.Trim(); 
        mTo = Strings.Trim(txtto.Text); 
        
        //set the content 
        mSubject = txtsubject.Text.Trim(); 
        mMsg = txtmessage.Text; 
        
        mMailServer = "localhost"; 
        mPort = 25; 
        System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage(mFrom, mTo, mSubject, mMsg); 
        
        //*************************Send Attachment *************************' 
        if (!string.IsNullOrEmpty(FileUpload1.FileName)) { 
            
            message.Attachments.Add(new Attachment(FileUpload1.PostedFile.InputStream, FileUpload1.FileName)); 
        } 
        
        else { 
            lblmessage.Text = "Select Attachemnt!!!"; 
            return; 
        } 
        //--------------------------------------End----------------------------' 
        
        //*************************Send Inline Image ***********************' 
        
        if (!string.IsNullOrEmpty(FileUpload1.FileName)) { 
            
            
            //create the Plain Text part 
            AlternateView plainView = AlternateView.CreateAlternateViewFromString("", null, "text/plain"); 
            
            // create the Html part 
            //to embed images, we need to use the prefix 'cid' in the img src value 
            //the cid value will map to the Content-Id of a Linked resource. 
            //thus  will map to a LinkedResource with a ContentId of 'image' 
            
            AlternateView htmlView = AlternateView.CreateAlternateViewFromString(".", null, "text/html"); 
            
            //select the image 
            Attachment at = new Attachment(FileUpload1.PostedFile.InputStream, FileUpload1.FileName);     
                       
            //create LinkedResource (embedded image) 
            LinkedResource logo = new LinkedResource(FileUpload1.PostedFile.InputStream, "text/plain"); 
            logo.ContentId = "image"; 
            
            //add the LinkedResource to the appropriate view 
            htmlView.LinkedResources.Add(logo); 
            
            //add the views 
            message.AlternateViews.Add(plainView); 
            message.AlternateViews.Add(htmlView); 
        } 
        
        
        //--------------------------------------End----------------------------' 
        
        
     //******************************Send CC******************************' 
        if (!string.IsNullOrEmpty(txtbcc.Text)) { 
            message.Bcc.Add(txtbcc.Text.Trim()); 
        } 
        //-------------------------------End-----------------------------------' 
        
        //******************************Send BCC**************************' 
        if (!string.IsNullOrEmpty(txtcc.Text)) { 
            message.CC.Add(txtcc.Text.Trim()); 
        } 
        //-------------------------------End----------------------------------' 
        
        
        //send the mail 

        SmtpClient mySmtpClient = new SmtpClient(mMailServer, mPort); 
        mySmtpClient.UseDefaultCredentials = true; 
        mySmtpClient.Host = "<”your ip address here”>"; 
        mySmtpClient.Send(message); 
        clear(); 
        lblmessage.Text = "Mail has been sent Successfully !!!"; 
    } 
    
    catch (Exception ex) { 
        lblmessage.Text = ex.Message; 
    } 
}


Sending Mail to Multiple Recipients

VB

Protected Sub lstto_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles lstto.SelectedIndexChanged
        Try
            If lstto.SelectedIndex > 0 Then     ‘if None
                If lstto.SelectedIndex = 1 Then ‘ if All
                    txtto.Text = ""
                    For Each li As ListItem In lstto.Items
                        If li.Text <> "All" And li.Text <> "None" Then
                            li.Value = li.Value
                            txtto.Text += li.Value + ","
                        End If
                    Next
                ElseIf lstto.SelectedIndex > 1 Then
                    'txtto.Text = ""
                    For Each li As ListItem In lstto.Items
                        If li.Selected = True Then
                            li.Value = li.Value
                            txtto.Text += li.Value + ","
                        End If
                    Next
                End If
            Else
                txtto.Text = ""
            End If
        Catch ex As Exception
            lblmessage.Text = ex.Message
        End Try
    End Sub
C#

protected void lstto_SelectedIndexChanged(object sender, System.EventArgs e) 
{ 
    try { 
        //if None 
        if (lstto.SelectedIndex > 0) { 
            // if All 
            if (lstto.SelectedIndex == 1) { 
                txtto.Text = ""; 
                foreach (ListItem li in lstto.Items) { 
                    if (li.Text != "All" & li.Text != "None") { 
                        li.Value = li.Value; 
                        txtto.Text += li.Value + ","; 
                    } 
                } 
            } 
            else if (lstto.SelectedIndex > 1) { 
                //txtto.Text = "" 
                foreach (ListItem li in lstto.Items) { 
                    if (li.Selected == true) { 
                        li.Value = li.Value; 
                        txtto.Text += li.Value + ","; 
                    } 
                } 
            } 
        } 
        else { 
            txtto.Text = ""; 
        } 
    } 
    catch (Exception ex) { 
        lblmessage.Text = ex.Message; 
    } 
}


Attachments
Screen Shot. (25711-4244-Mail.doc)