Re: [Exim] callbacks and <>

<snip>
> Domains where null senders are refused at MAIL or RCPT time can also
> be added to that list - that way, at least with versions of exim4 that
> we've used recently, the callback results in them being the immediate
> cause of our rejection (;-); and there's no maintenance needed, since
> as soon as they decide to behave properly, they'll have no further
> problems mailing to us. Seems fair to me? - modulo those folks who
> oppose callout on principle, of course.

All good and well but what do you tell a company like BMW South Africa
(bmw.co.za) to change their mind??