RE: SPAM on the list

Thomas Heide Clausen (
Wed, 25 Feb 1998 22:01:40 +0100 (CET)


Well...I usually send email to
- - thereby including postmasters, that have their sendmail
configured to allow arbitrary relaying (Ehh..usually I do ommitt if it is spam on the mailing list -
no reason to punish him for hosting the list, and he cannot do
much to it anyway).

Pretty often the user gets a free spanking, an I get written
apologies from the postmaster.

Local filtering is a good thing (sure is), but does
unfortunately not solve the problem (If you are on a modem to
some ISP's, then you most likely _have_ paied to download the

Making postmasters aware of the problem (Not by spamming them -
by asking them in a nice way) is the only way (imho) to cut down
the amount of spam. Especially it is a good thing if an email
has been relayed to help the postmaster on the relaying host(s)
to get his/her correct....Most likely he/she is as
annoyed by relaying the spam, as we are by recieving it.

(In a single case the postmaster _was_ the spammer - leaving
another domain hopelessly in the filters and eventually the
"black hole")

Speaking of spam, check out - if you have
not allready done so.

Just my DKK 0.25

- --thomas

On 25-Feb-98 Richard Gooch wrote:
> I have been running a spam filter for several months now,
> which cut my
> spam to 0 for a couple of months. I've now noticed an increase
> in spam
> sent to mailing lists such as linux-kernel. I'd like to put in
> a plea
> to the list maintainers that some kind of spam filtering be
> inserted
> at the input end of the list. The most recent piece of rubbish
> I've
> seen come in:
> writes:
>> Authenticated sender is <>
>> Subject: 2-24
>> Mime-Version: 1.0
>> Content-Type: text/plain; charset=3D"us-ascii"
>> Content-Transfer-Encoding: 7bit
> [Offal Deleted]
> Now, if you look at the header:
>> From: 5t53221 <>
>> Sender:
>> To: <>
>> Date: Wed, 25 Feb 1998 02:34:58 -0600
> This wasn't sent to the linux-kernel list, either in a "To:"
> or a
> "Cc:" line. So one simple recipe would be to send messages
> without
> such header lines to /dev/null.
> Another recipe could be to not allow postings by people not on
> the
> mailing list. I thought that this was already done?
> Yet another recipe could be to check the domain in the "From:"
> address
> and see if there is a match somewhere in the received path
> (i.e. a
> simple forgery test).
> So how about it guys? I have the feeling that spammers are
> targeting
> more and more mailing lists.
> Regards,
> Richard....
> -
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