delta.macosforge.org and HELO (was: texinfo doesnt function)

[Vincent Lefevre]

> $ host prunille.vinc17.org
> Host prunille.vinc17.org not found: 3(NXDOMAIN)

As I said, this is a machine on a local network, not visible from
the Internet. But the host can be resolved from the local network.

> Many (most?) mailservers won't accept mail from a host who supplies
> a HELO hostname that doesn't exist in dns.

This is completely wrong. I've been using this since 2003-12-26,
and this is the first time I get mail blocked for this reason.
What is common is that mail is refused when the IP address doesn't
have a reverse DNS, but my IP address has one.

> You should fix your MTA

The MTA works as expected: it gives the FQDN, which is resolvable
from the machines where the host is visible. The only machine that
can see the local network and can be seen from the Internet is the
NAT router, but it doesn't do SMTP forwarding.

> (and/or have it smarthost out to a 'real' mailserver).

The smarthosts of my ISP often get blacklisted because this is
a small ISP and this happens as soon as some client sends spam
(probably due to a compromised machine). That's the main reason
why I abandoned the smarthost solution.

If someone knows how to configure postfix to select a smarthost for
some domains only, this could be a solution (/etc/postfix/transport
has some documentation, I'll have to try...).

-- 
Vincent Lefèvre <vincent at vinc17.org> - Web: <http://www.vinc17.org/>
100% accessible validated (X)HTML - Blog: <http://www.vinc17.org/blog/>
Work: CR INRIA - computer arithmetic / Arenaire project (LIP, ENS-Lyon)