Re: qmail is officially public domain. have at it lads!

[Hugo Monteiro <hugo.monteiro@xxxxxxxxxx>]

Robert - elists wrote:
> As far as greylisting
>
> http://qmail.jms1.net/scripts/jgreylist.shtml
>
> JMS did some excellent work IOHO
>
> preference has been given to the earlier implementation (in perl) if I
> recall.
>
> Nobody here has stepped out with the C version yet, although I know there
> are folks using it.
>
> As far as Greetdelay, I am confused...
>
> I seem to recall that it wasn't RFC compliant...
>
> Anyone care to productively expand on that idea?
>
>  - rh
>
>
>
>   

Hello Robert,

Personally i believe that the approach of greylisting based solely on 
the incoming ip address very limited. Imagine that the spammer does a 
"strike two" on your server. It wouldn't mind if he was using another 
completelly different sender  and recipient. Your server had seen it 
before, and so it'd let it in. I believe you should look a bit more 
carefully at what greylisting using tuples imply.
Also, from my experience, perl in a high volume server is not a very 
good idea.

As for Greetdelay, it IS RFC compliant. An excerpt:

"One important reply is the connection greeting.  Normally, a receiver 
will send a 220 "Service ready" reply when the connection is completed.  
The sender should wait for this greeting message before sending any 
commands."


Hugo Monteiro.

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