Hi all,

Stemming on the topic we just had about delivering mail via UUCP to
SMTP hosts with strong protection, here is how I used to get round it
for my UUCP hosts.  I no longer use this config, however, due to me
having no more UUCP hosts left on my system, as they have all moved to
other systems.

I deligated the UUCP hosts to subdomains on hodgsonfamily.org, i.e,
uucphost.hodgsonfamily.org.  The system responsible for doing
UUCP2SMTP is called brookfield.hodgsonfamily.org, with an ip address
of 195.166.147.102.  When brookfield sends via SMTP to the relevant
recipient's mail server, it uses the following parameter for the helo
string:

helo hodgsonfamily.org

I created the following DNS records:

uucphost.hodgsonfamily.org. in a 195.166.147.102
uucphost.hodgsonfamily.org. in mx 10 brookfield.hodgsonfamily.org.
uucphost.hodgsonfamily.org. in mx 20 backup-mx-provider.com
brookfield.hodgsonfamily.org. in a 195.166.147.102

I then created a reverse zone on my ISP's nameserver to point
195.166.147.102 at hodgsonfamily.org, and set the MTA to use that helo
argument.

Now when someone dials into my system and uses UUCP, they send the
message via UUCP to brookfield, which in turn sends it to the relevant
MX record.  The reverse envelope is
<[EMAIL PROTECTED]>, which is looked up in the DNS,
it has both A and MX records pointing to the host that is sending the
mail, so it passes the DNS check, and when brookfield sends the helo
parameter of hodgsonfamily.org, this passes the PTR check, and so is
all well and good.

I also got the system working when the user had his own domain, in
this case he set the nameservers to nameservers I had control over
(ns1.hodgsonfamily.org, and a number of backups), and I created the
records as above:

mydomain.com. in a 195.166.147.102
mydomain.com. in mx 10 brookfield.hodgsonfamily.org.
[...]

I never had any complaints about mail getting lost with this setup.

Hope this helps,
Andrew.
--
Andrew Hodgson, Bromyard, Herefordshire, UK.
Email: [EMAIL PROTECTED]

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