Re: [exim] Recipient verify callout errors from one sender

David Woodhouse wrote:
>
> It could be that the recipient verification callout is misconfigured
> and is not using the /use_sender option, and the original poster's
> address is never actually seen in MAIL FROM:<...> so doesn't accept
> bounces.

Exactly the kind of "non-standard callout" I was talking about.

- Marc