On 2013-05-06 01:10:59 -0500, Stan Hoeppner wrote:
> On 5/5/2013 8:10 PM, Vincent Lefevre wrote:
> > Received: from carotte.tilapin.org (unknown [95.138.72.61])
> > by ioooi.vinc17.net (Postfix) with ESMTPS id EFA4959
> > for <vinc...@vinc17.net>; Tue, 2 Oct 2012 03:15:23 +0200 (CEST)
> >
> > $ host 95.138.72.61
> > Host 61.72.138.95.in-addr.arpa. not found: 3(NXDOMAIN)
>
> ~$ host 95.138.72.61
> Host 61.72.138.95.in-addr.arpa. not found: 3(NXDOMAIN)
>
> ~$ host carotte.tilapin.org
> carotte.tilapin.org has address 5.187.106.61
>
> Not only is rDNS non-existent but the HELO name points to an IP
> different than the client IP. It's difficult to FUBAR this more than it is.
AFAIK, there's no requirement in the RFCs that the HELO name point
to the client IP, and there are good reasons to allow a mismatch, e.g.
due to several machines sharing the same IP with NAT, or a machine
having several interfaces (with several IPs), or a laptop that can
move between various networks.
> > and this is from a Debian developer.
>
> Your logic would suggest that fighter pilots are intrinsically excellent
> kite fliers. This is simply not the case. Most have never flown kites.
> I would make an educated guess than most Linux app devs know nothing
> about SMTP RFCs or BCPs or setting up a server properly. Most likely
> know only enough to plug an IP or hostname of an SMTP relay server into
> their MUA, just like most non dev users. How many Apache devs know how
> to code for Gnome? How many Gnome devs know how to patch bugs in mysql?
>
> Being a Debian developer carries zero weight here.
I just meant that
* his mail config is probably sane (the fact that the IP doesn't
have a rDNS is not his fault, but the ISP's);
* one can lose rather important mail (e.g. related to work).
Anyway one should be able to configure *client*-side mail software
without being a specialist of SMTP RFCs and things like that...
--
Vincent Lefèvre <vinc...@vinc17.net> - Web: <http://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <http://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
