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* Justo Alonso <justo.alonso@???> [20031009 15:14]: wrote:
> On Thursday 09 October 2003 14:08, Odhiambo G. Washington wrote:
>
> go to the url in the log message:
> http://help.yahoo.com/help/us/mail/defer/defer-02.html
>
> at the end of the page.... submit your IP address when you secure your
> network.
>
Hello Justo et al,
I know that my server 62.8.64.4 is very secure [1] and cannot be used
as open relay by hosts other than victim hosts in my +relay_from_hosts.
However, I know this problem emanated from one of the
servers
that use this box as a smart host. This is what I'd like to identify.
BTW, does someone have a way of checking if a mail being sent is cascaded
within Exim? I am thing something like checking for "Received" headers:
If there are two levels of those, then I'd like to reject the message.
This is an idea just coming into my mind:
(a) mail from a MuA into my server never have "Received .." headers
initially, yes?
(b) mail from server C to Server B, then to Server A has two levels
of "Received headers", correct? This is what I'm wondering if
anyone has checks for, or even if it's sane to think that one
can do such checks.
What I am aiming at is a situation where if the server submitting
a message is in my +relay_from_hosts, then two levels of Received headers
is potential open relay, so reject.
Ideas are welcome.
[1] If someone can discover an glaring hole, I welcome it.
-Wash
--
Odhiambo Washington <wash@???> "The box said 'Requires
Wananchi Online Ltd. www.wananchi.com Windows 95, NT, or better,'
Tel: +254 2 313985-9 +254 2 313922 so I installed FreeBSD."
GSM: +254 72 743223 +254 733 744121 This sig is McQ! :-)
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