Milter-greylist

--- Emmanuel Dreyfus <manu@...> wrote:

> On Fri, Jan 28, 2005 at 03:48:21PM -0000, hvli
> wrote:
> > Then, I have a question.  I have many users who
> regularly receive 
> > mails from many countries.  I have no idea if
> those servers repeat 
> > or not repeat messages.  The chances are that some
> of them may not 
> > repeat, you never know in advance.  It seems that
> the way to know 
> > those not-repeat-message-servers is to let my
> users miss some (maybe 
> > a lot) emails before they realize and report the
> problem to me.  
> > They will be very upset! (I will be upset too if
> that happens to 
> > me).  Is this the case it should be?  I have no
> way to ask every 
> > user in my system to tell me whom they should
> receive email from.  
> > Then, what to do?
> 
> Non resending hosts violate the SMTP standard. They
> already loose mail
> on a random basis without greylisting: if a server
> is too busy, it will
> refuse new message with a temporary error, and a non
> resending server
> will loose the server.
> 
> greylisting makes the loss permanent. This is a
> great opportunity for
> the borken site to discover the wrong setup and fix
> it. In any wase, 
> the person to blame is the non resending site
> administrator. 
> 
> -- 
> Emmanuel Dreyfus
> manu@...
> 

Could you explain what information the greylist will
send to the sender's server before my server accepts
the message?  Something like "server temporarily not
available", "Please resend message again", or
something else? 

Thanks!

Harvey

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