Michael Handiboe wrote:
hhmmm ...
I don't have a DKQUEUE or a DKSIGN, but I am running with Domain Keys....
My domains are receiving gobs of spam, but it's nearly all 'text only'
with maybe a small graphic or colored text. I sure would like to get
rid of that stuff...
I don't know who's "responsible" for it, but I sure have a hard time
with the tcp.smtp file. Someone made a start in the wiki, which I
finally read yesterday, but this little file seems to do so much ...
does it basically read like an IPtables rule?
This is as far back as I see your posting about spam, Michael.
Yes, the tcp.smtp reads like an iptables rule. Most things in Linux go
with the match-bail method, meaning that it processes the files from top
down, and the first rule it matches wins - the rest are not even read
(it bails after a match).
Look at your spam messages that you get, and their headers. You can
send me 1 or 2 headers off-list if you'd like (headers only, or my
system will probably block you) and see what rules ARE being triggered
by the offensive spam. Do you do any updates on rules now? Do you have
any extra rules in place? If not, then I highly suggest it. If you see
that spam messages are hitting certain rules, but those rules are giving
them a low score, you can adjust the score up. I usually end up giving
6-20 rules a higher score than the default because they're hitting on
most spam (it varies between my clients - some things that would be spam
to one company are not to another).
Spamdyke, from what Eric and a couple others say, has been effective
with decreasing spam. I cannot say for sure, since I am not running
it. You will also need to look at what blacklists you're using. You
may need to make some adjustments there as well.
I personally do not get much of a decrease by using greylisting, but
that may just be my spam situation. I get more blocked by checking for
reverse IP information, which is controlled in your smtp/run file. This
blocks ~85% for me.
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