Why can SmtpClient.SendAsync only be called once?

Question

I\'m trying to write a notification service (for completely legit non-spam purposes) in .NET using SmtpClient. Initially I just looped through each message and sent it, however

Answer 1

You might be able to use the following:

ThreadPool.QueueUserWorkItem(state => client.Send(msg));

This should allow your messages to be queued and sent as threads become available.