On Jan 31, 2007, at 9:47 AM, Charles Cazabon wrote:
jason kawaja <kawaja@ece.ufl.edu> wrote:
hmm. Perhaps I am wrong - but it has been my perception that
there are
those who block all dynamic IPs. We should let them speak up if
they are
there.
i do (at least i trust rbl lists that say they are blocking
them). the
rare cases of legitimate email blocked do not outweigh the
effectiveness of
blocking the many illegitimate mails. people can relay their
originated
dynamic deliveries through a server provided by their ISP or
similar, it's
not too much to ask.
Maybe where you come from. The last ISP I was with listed all of its
customers addresses as "dynamic", even when they weren't, and the
mail server
they provided lost ~10% of all mail and regularly introduced 4-5 *day*
delivery delays to the rest.
ISP-provided mail servers have gotten significantly worse over the
last ten
years, to the point that simply saying "relay through your ISP's
smarthost" is
no longer good advice.
quality of service can degrade anywhere, it's up to the paying
customer using the service to demand for better by perhaps switching
providers. i refuse to "pick up the slack" for someone else's
oversight by subjecting my users to an overwhelming amount of
illegitimate (unwanted, etc) email. so for the record i am not
offering advice however i am providing reasonable justification for
my policy.
as someone pointed out, rbl sites do indeed only provide the list and
do not block (i worded it incorrectly above). i am blocking
(bouncing) using rblsmtpd when a list it consults returns positive on
ip query.
--
Jason Kawaja, 2-4568
IT Expert, UF Dept of ECE
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