At 10:40 PM -0400 2003/08/29, Richard Rognlie wrote:
If a host does not identify itself, I don't want it's mail. RFC2821
clearly says that it should identify itself with its FQDN. so the
lack of a '.' in the HELO argument is enough to cause a rejection
(if I wanted).
You can do whatever you want for your own e-mail. However, we
are not here to discuss solutions that individuals can apply to their
own mail systems. We are here to discuss solutions that we can
recommend to everybody else in the world should apply to their e-mail.
As such, we can be as draconian as we want with our own e-mail,
but our recommendations as to what others should do must be much more
conservative.
Right. The only problem I can envision is if you're behind a NAT,
and you claim to be 192.168.x.y. *why* you;d claim that instead of the
IP of the NAT... or better the hostname that the NAT represents...
I have no idea... Besides... shouldn't NATed boxes send mail to their
*local* outbound MTAs first? So, you know what...? I don't care.
Feel free to block whatever you want. But don't expect us to
take your own personal restrictive policies and recommend that others
also implement them, or be forced to implement them.
The DRIP milter ftp://ftp.gamerz.net/pub/dripmilter.pl
has been tweaked to think that non-FQDNs (that do not match after
even doing a resolv.conf "search") or IPs (that mismatch) are
enough cause to FAIL the DRIP test.
If you want to run an ISP or business this way, all I can do is quote:
"I invite my competitors to design their networks this way"
-Randy Bush
--
Brad Knowles, <brad(_dot_)knowles(_at_)skynet(_dot_)be>
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
-Benjamin Franklin, Historical Review of Pennsylvania.
GCS/IT d+(-) s:+(++)>: a C++(+++)$ UMBSHI++++$ P+>++ L+ !E-(---) W+++(--) N+
!w--- O- M++ V PS++(+++) PE- Y+(++) PGP>+++ t+(+++) 5++(+++) X++(+++) R+(+++)
tv+(+++) b+(++++) DI+(++++) D+(++) G+(++++) e++>++++ h--- r---(+++)* z(+++)
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