[hashcash] Hashcash and ColdFusion

For anyone that wants to send out mail from ColdFusion
with hashcash, it's not hard. Here's some example code:

Didn't take much to get this working. There is
a command line executable at hashcash.org that
you can download. So, (after removing buncha
dynamic stuff for clarity here) it looks like this:


     <CFTRY>
         <CFEXECUTE
             name="c:\hashcash.exe"
             arguments="-mb22 user@xxxxxxxxx"
             variable="hashCashResult"
             timeout="5">
         </CFEXECUTE>

         <CFCATCH type="Any">
             <CFSET hashCashResult="">
         </CFCATCH>
     </CFTRY>


<CFMAIL
     TO="user@xxxxxxxxx"
     FROM="me@xxxxxxxxxx"
     SUBJECT="Password Reminder"    >
Hello user,
The password for your account is: some_password

Cheers,
The Database
<CFIF Len(hashCashResult) NEQ 0>
     <cfmailparam
     name = "X-HashCash"
     value = "#hashCashResult#" >
</CFIF>
</CFMAIL>

Here is how much SpamAssasin adjusts the spam score based
on the number of bits used (22 in the above example)
Hashcash 20  bits -0.500
Hashcash 21  bits -0.700
Hashcash 22  bits -1.000
Hashcash 23  bits -2.000
Hashcash 24  bits -3.000
Hashcash 25  bits -4.000
Hashcash >25 bits -5.000

Cheers all,
Anders
+===========================================================+
|Anders Green                 Email: anders@xxxxxxxxx       |
|                              Home: 919.303.0218           |
|        Off Road Rally Racing Team: http://linaracing.com/ |
+===========================================================+


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