Ira Abramov wrote:
you know the type, lots of random text and the spam is in an attachment
that changes ever so slightly to avoid getting a unique signature for
razor/pyzor and friends.
<snip>
the only option is of course to authorize with a while list, like I saw
some services have. first time you send me and Email I make sure you are
human with a return mail to a URL with captcha, and you can then mail me
freely. this kind of setup is a problem with mailing list, return mail
from websites you just subscribed to but have no idea where their
automatic mail will come from... in short, it's a serious pain in the
butt, but possibly worth it.
Too much, neverending work. Besides, it will surely annoy legitimate
senders.
what do YOU do to fight this? the smartest filter I know is Google's and
even IT fails on some spams every day.
All image spam comes from botnets. It's becoming a very serious problem.
The best way I found to combat them is to use safe.dnsbl.sorbs.net at
the MTA level. This is an agregate zone that includes dynamc address
scopes used by botnets. See http://www.us.sorbs.net/using.shtml
Cheers,
Henry
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