Error in "for" loop, can't send mail via outlook

using System; 
using System.IO; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using Excel = Microsoft.Office.Interop.Excel; 
using Outlook = Microsoft.Office.Interop.Outlook;

using System.Collections;

namespace XYZ 
{ 
class Program 
{ 
//method to send email to outlook 
public static void sendEMailThroughOUTLOOK() 
{ 
try 
{ 
// Create the Outlook application. 
Outlook.Application oApp = new Outlook.Application();

// Create a new mail item. 
Outlook.MailItem oMsg = 
(Outlook.MailItem)oApp.CreateItem(Outlook.OlItemType.olMailItem);

// Set HTMLBody. 
//add the body of the email 
oMsg.HTMLBody = "See the details";

//Subject line oMsg.Subject = "Doc Info";

// Add a recipient. 
Outlook.Recipients oRecips = (Outlook.Recipients)oMsg.Recipients;

// Change the recipient in the next line if necessary. 
Outlook.Recipient oRecip = (Outlook.Recipient)oRecips.Add("abc@xyz.com"), oRecip.Resolve();

// Send. 
oMsg.Send();

// Clean up. 
oRecip = null; 
oRecips = null; 
oMsg = null; 
oApp = null; 
} 
catch (Exception ex) 
{ 
} 
}

private static string EX_PATH = @"F:\Document_Excel.xlsm"; 
private static Excel.Workbook AXBook = null; 
private static Excel.Application AXApp = null; 
private static Excel.Worksheet AXSheet = null;

public static string exception = "";

static void Main(string[] args) 
{ 
if (args == null || args.Length < 4) 
{ 
Console.WriteLine("Let's start the work!"); 
Console.WriteLine("press any key to continue"); 
Console.ReadLine(); 
} 
else 
{ 
AX_PATH = args[0]; 
}

AXApp = new Excel.Application(); 
AXApp.Visible = true;

exception = ""; 
try 
{ 
AXBook = AXApp.Workbooks.Open(AX_PATH, 0, true, 5, "", "", true,Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0); 
} 
catch (System.Exception ex) 
{ 
exception = ex.Message; 
}

exception = ""; 
try 
{ 
AXSheet = (Excel.Worksheet)AXBook.Sheets["Sheet First"]; 
} 
catch (Exception ex) 
{ 
exception = ex.Message; 
}

Console.WriteLine("Hello");

Excel.Range last = AXSheet.Cells.SpecialCells(Excel.XlCellType.xlCellTypeLastCell, Type.Missing); 
Excel.Range range = AXSheet.get_Range("A1", last); 
int lastUsedRow = last.Row; 
int lastUsedColumn = last.Column;

Object missing = System.Type.Missing; 
for (int i = AXSheet.Cells.get_Range("d", missing).Row + 1; i <= last.Row; i++) 
{

Console.WriteLine("Hello"); 
sendEMailThroughOUTLOOK(); 
}

} 
}

}