SPAM Prevention/Blacklists

Wed Mar 3 23:35:27 UTC 2004

On Mar 3, 2004, at 6:00 PM, Richard Welty wrote:

>> Of the ones above, I only use spamhaus, combined with opm.blitzed.org 
>> &
>> relays.visi.com
>
> i use the same ones as Patrick, but i also use the cbl (a component of 
> the
> spamhaus xbl, perhaps the only one at the present time, but that could 
> change.)

Mind if I ask why you don't use the sbl-xbl?

BTW: I also use haebeas & bogons, but not really sure you would call 
haebeas a blacklist. :)

> one thing i do is use opm.blitzed.org and cbl.abuseat.org at connect 
> time.
> hosts on these lists are pretty much guaranteed to be open proxies or
> compromised hosts, so listening to them at all is a waste of time. no 
> need
> to wait until after RCPT TO: to 5xx, i just drop the connection.

I love opm.blitzed.  I haven't tried cbl.abuseat.org.  I'll have to 
check it out.

>> Also, I like sender verification, but that's me.
>
> i used it for some time, and reluctantly shut it down. blocked a lot 
> of email
> abuse, but too many false positives for my taste.

Could you go into more detail?

I've only been using it a couple months, but I have a whole 1 false 
positive, and I'm not sure I'd call it a false positive.  (Web page 
which sent e-mail and allowed anything in "from" address, but was 
password protected internal thing, so they were not doing sanity 
checking thinking it was guaranteed good e-mail.)

Maybe I have others I just don't know about?  How many people send 
legit e-mail with return addresses which are bogus?

-- 
TTFN,
patrick

P.S. Disclaimer: I'm authoritative for the spam BLs I use.