Whenever our users travel outside the internal networks and send email
to each other, the emails get tagged by the below reports (yes, I
cranked up the default scores because of the botnet crap out there)
because they are on dyn IPs and sending direct to the receiving MTA.
I see a couple of ways that this can be remedied, most of which is
acceptable. a) Whitelist all of the users (or the entire domain) for
every domain on the system [obviously bad since it allows spammers to
spoof from headers with impunity even with SPF setup]. b) set up second
machine to be a second MTA and have users send email from machine 2
which then relays to machine 1 [waste of a machine and energy to run
that machine]. or c) there is some configuration I am missing. Does
anyone know what I can do to fix this?
Thanks,
Tom
* 0.7 RCVD_IN_SORBS_DUL RBL: SORBS: sent directly from dynamic IP
address
* [xx.xx.xx.xx listed in dnsbl.sorbs.net]
* 2.5 RCVD_IN_NJABL_DUL RBL: NJABL: dialup sender did non-local SMTP
* [xx.xx.xx.xx listed in combined.njabl.org]
