Re: [exim] Re: Report of new spam technique

On 6 Feb 2005 at 17:24, Alan J. Flavell wrote about

    "Re: [exim] Re: Report of new spam t":

| On Sun, 6 Feb 2005, Richard Clayton wrote:
|
| > An absolutely key measurement is delivery failures.
| >...
|
| Yes, but based on what? Envelope-sender address? IP address of
| offering MTA?

Authenticated sender, I would think. Requiring SMTP AUTH is a
reasonable presumption.

- Fred