Re: [Exim] Yahoo and sender verification callout

On Thu, May 22, 2003 at 07:37:50AM +0100, Giuliano Gavazzi wrote:
> I don't know how common is that a dictionary attack will also
> randomly change the sender local part. I haven't seen it yet. So, if
> it does not change, all you'll see is one callback per attacked host.

I saw one recently - used the popular smtp load testing tool "postal" to
generate dictionary attacks on our servers.