SM,

> > Where on earth did this response come from ?
>
> The response came from the mail server for cobatco.com. They have a
> user subscribed to this mailing list.

Yes: admin@cobatco.com, to whom I was trying to respond. But I worded
my question badly - what I meant was: why on earth should their machine
think that I am a Polish spammer ? The IP address is in one of the
static blocks administered by my (UK) ISP.

Jonathan