On Thu, 8 Aug 2002, Russell Wilton wrote:
> Hi:
> I am running Exim 4.05 on RedHat Linux 7.2. Our campus is behind a
> firewall which also provides a "DMZ" area for machines that are
> accessible to the Internet. I run one machine (A) in the DMZ which is
> set up in our DNS server to be the only access point for incoming mail.
> It virus scans and spam scans the mail and then uses manualroute to
> pass the acceptable stuff on to any of a set of internal mail hubs. It
> uses a nearly default SMTP ACL which includes a "require verify =
> sender" command. My main internal mail hub (B) also uses a nearly
> default SMTP ACL which includes a "require verify = sender" command.
> Neither machine has any "accept" commands before the require other than
> one to accept root and postmaster mail.
> Looking in the reject log on the internal machine (B) I find many
> messages where "Sender verify failed" or "host lookup did not complete".
> My question is : Why am I seeing these on the internal machine? Why
> didn't the DMZ machine (A) reject them? A "host" or "nslookup" command
Does the DMS machine have a 'smarthost' type router that doesnt have
no_verify set?
A smarthost router will cause pretty much all addresses to verify. ;)
> on both machines produces the same result: it does not find the rejected
> host. Any ideas greatly appreciated. Thanks.
>
> Russ
>
> --
> Russell D. Wilton E Mail: WILTON@???
> Network Services Manager Voice: (403) 329-2525
> University of Lethbridge FAX: (403) 382-7108
> 4401 University Drive Lethbridge, Alberta, CANADA T1K 3M4
>
>
>
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