Kamaelia Grey

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Relevant disclosure? - Kamaelia came out of my day work @ BBC Research - Kamaelia grey came out of my personal frustration...

Drastic Spam reduction through Greylisting Greylisting made easy through natural concurrency Natural concurrency made eas...

Problem? <ul><li>Spam was getting ridiculous </li></ul><ul><li>One weekend the number of emails to home address topped 100...

Kamaelia <ul><li>Day project at the BBC since 2003 </li></ul><ul><li>Toolkit for making concurrency easy to work with in ...

Greylisting 1 <ul><li>Client connects, wants to send us mail </li></ul><ul><li>Have we let their email through before? </l...

Greylisting <ul><li>Client connects, wants to send us mail </li></ul><ul><li>Have we seen them before? </li></ul><ul><li>N...

Greylisting <ul><li>Client comes back after KTHXBYE </li></ul><ul><li>Is it a resend of the same message after a reasonabl...

Greylisting <ul><li>Client comes back after KTHXBYE </li></ul><ul><li>Is it a resend of the same message after a reasonabl...

Greylisting <ul><li>Client comes back after KTHXBYE </li></ul><ul><li>Is it a resend of the same message after a reasonabl...

Where?

Here!

Requirements <ul><li>Python 2.3 onwards </li></ul><ul><li>Must run your own mail server already </li></ul><ul><li>Requires...

Mail serving UNTRUSTED INTERNET

Mail serving UNTRUSTED INTERNET MAIL SERVER 25

Mail serving UNTRUSTED INTERNET MAIL SERVER 25

Mail serving UNTRUSTED INTERNET MAIL SERVER 25

Greylisting UNTRUSTED INTERNET MAIL SERVER 8025

Greylisting UNTRUSTED INTERNET MAIL SERVER 8025 Kam Grey 25

Greylisting UNTRUSTED INTERNET MAIL SERVER 8025 Kam Grey 25

Installing <ul><li>Grab the code & install </li></ul><ul><ul><li>python setup.py install </li></ul></ul><ul><li>Configure ...

Basic config port = 25 servername = mail.cerenity.org serverid = Kamaelia-SMTP 1.0 smtp_ip = 192.168.2.9 smtp_port = 8025 ...

Local config allowed_senders: 127.0.0.1 allowed_sender_nets: 192.168.2 allowed_domains: private.thwackety.com thwackety.co...

Exceptions # Standard triples which always allows delivery to domains we consider # accepting for. # # Format: # IP addre...

Exceptions # Some non-standard triples for which we always allow delivery # to domains we consider accepting for. # Format...

Logging? Standard log: /var/log/greylist.log 20071106172215.940 | dsl88.241-20782.ttnet.net.tr | 88.241.81.46 | <linhotepm...

Logging? Debug log: /var/log/greylist.log 250 OK 250 ACCEPTED 451 4.7.1 Please try again later 220 mail.cerenity.org ESMTP...

But also... Debug log: /var/log/greylist-debug.log *debug* THREADS['Kamaelia.Chassis.Pipeline.Pipeline_7', 'Kamaelia.Inter...

Internals Debug log: /var/log/greylist-debug.log ['Kamaelia.Chassis.Pipeline.Pipeline_7', 'Kamaelia.Internet.Selector.Sel...

Internals Debug log: /var/log/greylist-debug.log Kamaelia.Internet.Selector.Selector_11 – wakes system on network events ...

No connection! TCPServer Greylist Server Selector

New connection! TCPServer Greylist Server Selector Connected Socket Adapter GreyListing Policy

More connections! TCPServer Greylist Server Selector Connected Socket Adapter GreyListing Policy Connected Socket Adapter ...

Accepted! GreyListing Policy TCPClient Connected Socket Adapter MAIL SERVER 8025

Rejected! Connected Socket Adapter GreyListing Policy

Greylisting GreyListing Policy Concrete Mail Handler Mail Handler

Internals The following pages are intended as a walk through of the key highlights of the code-base. It skips the body of ...

Internals class MailHandler(Axon.Component.component): logfile = "greylist.log" debuglogfile = "greylist-de...

Internals class MailHandler(Axon.Component.component): def __init__(self,**argd): def logging_recv_connection(self): def g...

Internals class ConcreteMailHandler(MailHandler): Inboxes = { "inbox" : "Data from the client connecting to...

Internals class ConcreteMailHandler(MailHandler): def connectToRealSMTPServer(self): def __init__(self, **argv): def error...

Internals class GreyListingPolicy(ConcreteMailHandler): allowed_senders = [] allowed_sender_nets = [] allowed_domains = [ ]

Internals class GreyListingPolicy(ConcreteMailHandler): (continued) def shouldWeAcceptMail(self): def sentFromAllowedIPAdd...

Internals class GreylistServer(MoreComplexServer): logfile = config["greylist_log"] debuglogfile = config["...

Internals class GreylistServer(MoreComplexServer): (continued) # ... class protocol(GreyListingPolicy): servername = confi...

And that... Saves me having to wade through now literally tens of thousands of spams over the past two months: # grep DEFE...

Time to write? 2 days start to finish including protocol Bug fixes ~1-2 days tops

Questions? Thank you :-) I hope it's useful to you :)

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