Threading when sending emails

using System;
using System.Threading;

class Test
{
    static void Main()
    {
        Thread newThread =  new Thread(new ThreadStart(Work.DoWork));
        newThread.Start();
    }
}

class Work
{
    Work() {}
    public static void DoWork() {}
}

ThreadPool.QueueUserWorkItem(delegate { SendMail(message); });