For the IP-only HELO, or for HELO addresses you don't like, why not
reject it during filter_helo? That's when I do it (though, I don't
think I'm doing it for IP-only HELO's, I'm just doing it for obviously
stupid HELO's, like ones that claim to be from my own domain when the
IP addr isn't in my block, or from localhost when it's not localhost).
On Mar 11, 2006, at 7:23 AM, Dirk the Daring wrote:
As I understand it, different MIMEDefang instances (slaves) may
handle a given E-Mail as it progresses from "early" functions (e.g.
filter_helo, filter_sender, filter_recipient) to the "later" functions
(e.g. filter_begin, filter, filter_multipart, filter_end) that are all
handed by one instance,
I'm wondering if anyone has a low-cost mthods of passing the fact
that a particular incoming E-Mail had an IP-only HELO (I flatly REJECT
any HELO that is not an FQDN or that's otherwise obviously bogus - such
as my own IP address or Domain Name), or detecting that sendmail thinks
the HELO might be forged (as it notes in the "Received: from" header).
I'd like to use the information in filter_end, but I don't have the
HELO
string (which I analyzed back in "filter_recipient" and would prefer
not
to "pay" to extract from the headers and analyze again) and I'm not
sure
how to detect the "may be forged" indication from sendmail, since I
don't think that header is available in filter_end.
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