SPF might help
At 07:56 PM 9/2/2006, you wrote:
Hi Darrel:
Thanks for the rant. I can live with AOL since they send us copies of their spam complaints. However, ISPs like Comcast, Verizon and ATT just block our mailservers and take the position that we should be filtering the outgoing mail from our server so they don't have to use their resources to do it.
Our users aren't spamming. The problem seems to be spam addressed to them that is being forwarded to their Comcast (or AOL or ATT) account. Some of the more clueless setup global catch-alls which then forward dictionary attack spams to their local ISP.
So we're going to do two things; first, prevent the use of global catch-alls other than bounce, and, second, filter all email and delete anything with a spam score over 10 whether the user has spam filtering turned on or not.
We'd like to filter all outgoing email but it we can't do that with qmail we'll just filter all incoming email and hope that covers it.
At 07:24 PM 9/2/2006, you wrote:
Why are they demanding that you filter outgoing mail?
If your users are sending illegitimate email it can be traced back to
the source easily enough. received from: headers and radius logs make it
pretty straight forward.
<rant>
I personally don't like the strong arm policies of some of the larger
providers. I'm tired of getting mail from [EMAIL PROTECTED], a majority of
bounces I receive from them are legitimate email lists on my mailman and
ez-mlm servers. There is nothing in place for recourse. I have to deal
with spam from the massive bot nets lurking on their networks. They can
deal with processing the mail from my minuscule user base. I think they
need to provide a better security infrastructure and educate their end
users, rather than try to pass the buck onto a smaller provider.
</rant>
On Sat, 2006-09-02 at 14:13 -0400, Jeff Koch wrote:
> Hi
>
> We are getting demands from large ISP's - Comcast, AOL, AT&T - that we spam
> filter all outgoing email. We're using simscan to filter incoming email but
> I think that misses email generated by our customers and autoresponders.
> Can it be accomplished by modifying /home/vpopmail/etc/tcp.smtp ?
>
> How are other qmail users handling this?
>
> Thanks in advance.
>
>
>
> Jeff Koch
>
>
>
Best Regards,
Jeff Koch, Intersessions
Palaver Consulting Group
http://www.palaver.org
*Serving our clients since 1984*
