[Klug-general] ADVERT: Freebie filtering for the under 11s

[Martin A. Brooks]

Colin McCarthy wrote:
> How does your system actually filter our mail?  How does it tie into
> my existing domain and email server (from hosted company) and into my
> inbox?
>    

To use AntibodyMX you need to be in control of your own MX records.  
Rather than these records pointing at your real mail server, you point 
them to our frontend cluster. These machines (there are many for reasons 
of redundancy and load balancing) then accept mail connections on behalf 
of your domain.

Essentially there's 4 layers of filtering:

1) A commercial database of known-spamming IP addresses, updated every 
30 minutes.
2) A variant of greylisting, the first time a unique fingerprint for a 
sending mail server is seen, the connection is deferred for a short 
period of time.
3) Antispam filtering using SpamAssassin and our own in house tools.
4) Antivirus filtering using ClamAV.

The freebie service offers all 4 of these layers, any one can be turned 
off if you wish (obviously not many people choose to turn off layer 3 
:).  Email not making it through is rejected at SMTP time.  A genuine 
sender who's mail is thought to be spam or contain a virus will be 
notified.  Mail that makes it through is then forwarded on to your real 
mail server.

The not-free service offers all sorts of extras such as quarantining, 
sender blocking, recipient address blocking, sender and domain 
whitelisting, options for choosing additiona RBLs and many others.

All our servers are either from Penguin Computing or Dell, we also use 
virtual servers from Bytemark (with whom we partner to provide filtering 
services) for various ancillary tasks.  They all run Debian/GNU Linux.

> Maybe you can explain this service at a KLUG meeting one day.
>    

I would like to except, alas, I am utterly terrified of public speaking :)

Regards


-- 

Martin A. Brooks |  http://www.antibodymx.net/ | Anti-spam&  anti-virus
    Consultant    |  martin at antibodymx.net      | filtering. Inoculate
  antibodymx.net  |  m: +447792493388           | your mail system.