Just don} worry about spam so much.
It has rarely been a problem on this or mos t groups and fighting it
isn't worth the inconvience.
It just isn't a problem.
I find it far easier simply to scroll past the occasionally bit of spam
that deal with the "solutions" that make me jump through hoops just to
post a message.
The solutions are much worse than the problem.
Just don't worry about it.
On Wed, 26 Dec 2007 11:17 am, Thomas Szukala wrote:
Harish Pillay wrote:
May I make a suggestion to whoever is running this mailing list to add
the greylist technique to it as well? I have had milter-greylist
running on
my main email servers for over 12 months now, and the amount of spam
reaching my users/mailing lists has gone down to almost zero.
I know greylisting works and is stopping spam very effective (for now).
However this behaviour puts high volume mailservers in a lot of stress.
Also I am experiencing, that spammers are adapting to greylisting and
are connecting multiple times to mailservers. Supposedly in order to
pass greylisting.
Thus, the administrators of these high volume mailservers have to get
rid of several thousands incoming connections per minute from a single
spammer (think of a botnet DDoS you) and delayed outgoing connections
for your customers.
You therefore have a higher deferr rate outgoing (doubling outgoing
connections) and therefore have a bigger mailqueue, additionally you
have more incoming connections (spam) blocking your available TCP ports
permanently only for the cause to reject them.
So my advice would be to not use greylisting, as it pushes the problem
to other parts of the internet and is effective only for a limited time
(if anyone is using it).
My thought is, that it would be much more effective to block
subscription by sophisticated captchas (take care of XSS
vulnerabilities ) . Also it might be effective to block subscriptions
by using lists of compromised hosts like CBL
(<http://cbl.abuseat.org>).
Try to identify which IPs are causing trouble and do match them with
several blacklists. The lists do not always work in the same way as it
does for others. Sometimes also only a mix of several lists are
working. <http://karmasphere.com/> might help you there.
If you dont have enough samples, be conservative. It is more a hassle
to gain legitimate listmembers back, who you have been lost during
subscription, as blocking fake accounts afterwards.
Have an eye on your subscriptions. Too many new listmembers is
certainly not a cause of marketing.
I might have come a little off topic, but perhaps it helps someone.
I am now getting back to my cookies, ice cream, cake and teas ;-)
Cheers Thomas
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