--On Thursday, May 6, 2004 7:39 pm +0100 Andy Fletcher <andy@???>
wrote:
>
> Many mailservers are configured (against the RFC guidelines) to refuse
> mail from "<>".
True, on a typical day we find about 350 including a couple of dozen in
either the .edu or .uk TLDs (which we keep a close eye on, so that we can
preempt complaints from local people).
I've succeeded in persuading several postmasters to fix their servers as a
result, but also failed to get a response from several more. I find it
helps a great deal to contact the failed correspondent, if there is one
(often, we're actually rejecting spam).
I think it would help if I could give some idea of numbers of people using
sender verification callout. There was a great response recently to a
message asking who uses exim, and I'd be very grateful if you could provide
these few details (if you use exim sender verification, or even some other
mailer with sender verification):
Name of institution:
Domain:
Using exim with sender verification callouts?
Y/N
Using another MTA with sender verification?
Y/N - if yes, please specify which mailer:
Does your MTA use the null sender during sender verification callouts?
Y/N - if no, please specify the address used:
Approx number of users?
Do you mind if I quote you in correspondence with other postmasters?
Y/N
Note, I'll only be contacting postmasters of institutions likely to require
to communication with academic institutions.
Do you mind if I list your site on a web page?
Y/N
Note, the web page will contain information about sender verification,
about configuration of various mail servers, and may list some sites that
use sender verification as well as some general statistics.
--
Ian Eiloart
Servers Team
Sussex University ITS
