> unfortunately, often spammers provide real return addresses - just not
> so if everyone used tmda, these poor unfortunates would receive
> millions of tmda confirm messages, in addition to the hundred thousand
> 'undeliverable' messages that they already get..
same concept as tmda (smtp "proxy") but not as extreme as tmda.net -
dnsbl, distributed checksum and various other checks.

from localhost (localhost [127.0.0.1])
	by phobos.labs.netnoteinc.com (Postfix) with ESMTP id 1E83C440F4
	for <jm@localhost>; Fri,  9 Aug 2002 11:00:13 -0400 (EDT)
from phobos [127.0.0.1]
	by localhost with IMAP (fetchmail-5.9.0)
	for jm@localhost (single-drop); Fri, 09 Aug 2002 16:00:13 +0100 (IST)
from webnote.net (mail.webnote.net [193.120.211.219]) by
    dogma.slashnull.org (8.11.6/8.11.6) with ESMTP id g79EeGb08984 for
    <jm-ilug@jmason.org>; Fri, 9 Aug 2002 15:40:16 +0100
from lugh.tuatha.org (root@lugh.tuatha.org [194.125.145.45]) by
    webnote.net (8.9.3/8.9.3) with ESMTP id TAA32513 for <jm-ilug@jmason.org>;
    Thu, 8 Aug 2002 19:25:57 +0100
from lugh (root@localhost [127.0.0.1]) by lugh.tuatha.org
    (8.9.3/8.9.3) with ESMTP id TAA30966; Thu, 8 Aug 2002 19:24:39 +0100
from florence.ie.alphyra.com
    (IDENT:nZkYDIusQDGfSMTyRHCNX/M/mWV8KiVA@itg-gw.cr008.cwt.esat.net
    [193.120.242.226]) by lugh.tuatha.org (8.9.3/8.9.3) with ESMTP id TAA30933
    for <ilug@linux.ie>; Thu, 8 Aug 2002 19:24:33 +0100
lugh.tuatha.org: Host IDENT:nZkYDIusQDGfSMTyRHCNX/M/mWV8KiVA@itg-gw.cr008.cwt.esat.net
    [193.120.242.226] claimed to be florence.ie.alphyra.com
from dunlop.admin.ie.alphyra.com
    (IDENT:Q8NVMw+yFsbveVz1gjcRJBC9MP9hAq+d@dunlop.admin.ie.alphyra.com
    [192.168.11.193]) by florence.ie.alphyra.com (8.11.6/8.11.6) with ESMTP id
    g78IOVQ31717; Thu, 8 Aug 2002 19:24:31 +0100
From ilug-admin@linux.ie  Fri Aug  9 16:05:42 2002

> i'm certain they already do strip after the +.  however, they'll
> have to respond to a confirm message when they send to my raw
> address.  and responding to a confirm message requires spammers to
> provide a real email address (which i can then blacklist - i've
> mapped y in mutt to whitelist; Y to blacklist) and effectively send
> the spam to each individual (which makes spamming more expensive
unfortunately, often spammers provide real return addresses - just not
so if everyone used tmda, these poor unfortunates would receive
millions of tmda confirm messages, in addition to the hundred thousand
'undeliverable' messages that they already get..