[Gllug] Spam

[ccooke]

On Fri, Oct 14, 2005 at 11:50:26AM +0100, Rev Simon Rumble wrote:
> 
> On 14/10/2005, "Mike Leigh" <mike.leigh at hornbill.com> wrote:
> 
> >Yes that's true.  However I think I would have a hard time really
> >proving that it was them that did this.  Say a prominent company gave
> >out the address that I had given to them and told them not to give this
> >to anyone else.  The new spam mail that I receive from the new company
> >will just be like any other spam that I may receive.  I can't be 100%
> >sure that the company got my address from someone that gave it to them
> >or that they mass mailed me from somewhere.  Chances are that it was
> >from that source but the proof would be hard to get I think.
> 
> Actually, incredibly easy to do.  Sign up to www.sneakemail.com and get a
> unique email address every time you have to give an email address for
> anything.  I do this for everything that asks for an email address
> online.

If you run Exim for your mail server and you receive any mail sent to a
domain, you can try this router:

aggregate:
  driver = redirect
  headers_add = X-Original-To: $local_part
  allow_fail
  data = ${if match{$local_part}{^(.*)(\\+|-)(.*)\$}{${if exists{/home/$1/.redirect_tags}{${lookup{$3}lsearch{/home/$1/.redirect_tags}{$value}{$1}}}{$1}}}{$0}}

Which I wrote for my home mail server.

What it does:

Any mail to validuser-anytag at domain (or validuser+anytag at domain, which was for
compatability with a nasty thing I had to use for an old job) is
redirected to validuser at domain. 

In addition, if a file called '.redirect_tags' exists in validuser's
home directory, it will be used as an alias file, so you can redirect
any tag to any mailbox you like. The format is:



# make this tag bounce
tagname: :FAIL: Sorry, I don't deal with spammers

# /dev/null
tagname2: :BLACKHOLE:

# redirect to another mailbox
tagname3: user at domain



It would be pretty easy to make the tags time-dependant, too. I've never
bothered, though. This provides enough control.


-- 
for((P=10**8,Q=P/100,X=320*Q/(`tput cols`-1),Y=210*Q/`tput lines`,y=-105*Q,v=\
-220*Q,x=v;y<105*Q;x=v,y+=Y));do for((;x<P;a=b=i=k=c=0,x+=X));do for((;a*a+b*\
b<2*P*P&&i++<99;a=((c=a)*a-b*b)/P+x,b=2*c*b/P+y));do :;done;(((j=(i<99?i%16:0\
)+30)>37?k=1,j-=8:0));echo -ne "\E[$k;$j"mE;done;echo -e \\E[0m;done # ccooke
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