Matt wrote:
I had the same issue and found that the system that's relaying
(216.129.105.40) those confirmation emails doesn't have a PTR record.
You'd think someone selling a antispam/email appliance would be familiar
with the RFCs.
That would explain why I got no confirmation, we do not accept email
from IP's without a PTR record.
I agree, if true this looks pretty bad for a so called antispam
company.
In fairness -- if you drop mail with no rDNS, you are dropping 3.6% of
legit email in general, going by the test results for our RDNS_NONE
rule... ;)
Everyone should block/defer ALL email with no reverse DNS. Then maybe
those email admins would get a clue.
Unfortunately, they won't (get a clue).
There are too many of them, and some are major players. For example, we
periodically have hassles with faculty and staff who have Verizon as
their ISP at home. Verizon will mess up its configurations so that our
server's paranoid settings start rejecting connections from our faculty
and staff when they are at home. We get no end of complaints. Then
Verizon will fix it. Then a few weeks later, it will be broken again.
--
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Chris Hoogendyk
-
O__ ---- Systems Administrator
c/ /'_ --- Biology & Geology Departments
(*) \(*) -- 140 Morrill Science Center
~~~~~~~~~~ - University of Massachusetts, Amherst
<[EMAIL PROTECTED]>
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Erdös 4
