Graeme Fowler wrote: > On Thu, 2008-03-27 at 13:35 -0700, Marc Perkel wrote:
>> Most of what I'm seeing are spammers. Is there legit email that does
>> this? Or is this just viruses?
>
> Note that I said "badly written mail applications". That covers the
> whole gamut of tripe-spewing crap you might find stuck on the sole of
> your shoe, from all manner of malware right through to really poor SMTP
> client implementations embedded in certain, old, web apps.
>
In fact, if you reject at HELO time, at least some old implementations
of MS Exchange did hammer this way. This does not means by sure it is spam.