18 Feb
2004
18 Feb
'04
6:59 a.m.
On Wed, 18 Feb 2004, Jay West wrote:
Sellam wrote....
Yes, this is normal behavious these days.
That's not a big deal, but the way some (AOL) are doing it, does
I think the reason it works when you receive
messages from CC and not
directly from me is because my siconic.com domain does not rDNS resolve
properly (stupid upstream ISP
As of late I have noticed that more and more major mail servers will not
process mail from any server who's forward and reverse dns do not match
exactly. violate RFC's. Specifically, even if the forward
and reverses DO match, but
the reverse lookup provides aliases as well, they will toss it. However,
this breaks an RFC-specified way of handling delegation of subnets on uneven
boundaries. *sigh*
Subnet delegation never worked well, so one simply should not do
it
at all... just delegate at the class level. Alias processing is
pretty much never done well in MTA's, *especially* not for reverse
lookups. Simply dont rely on it, keep the mail server addressing
as simple as possible, using a single address, and a single DNS
mapping for it, without CNAME and PTR crap, because that will
slow down processing for your address as a result of multiple
lookups.
--f