Re: [exim] First time SMTP connection with "temporary error"…

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Auteur: Johann Spies
Date:  
À: exim-users
Sujet: Re: [exim] First time SMTP connection with "temporary error" toreduce spams
On Thu, Feb 28, 2008 at 11:16:37AM +0100, Heron wrote:
> Hi,
>
> I have pointed out that some SMTP servers in the world reject incoming
> e-mails for the first time with a "temporary error" message. If the message
> comes second time it is accepted.
> This mechanism is used to reject many spams, since many spam sending
> computers do not try to send the message again after receiving "temporary
> error" message from the remote SMTP server.
>
> My question is - how to implement such mechanism in Exim 4.x ?
>


There are several forms of greylisting available. You can search
google for it. I am using exigrey:

http://www.schlittermann.de/doc/grey.shtml which is working well for
me.

Regards
Johann
-- 
Johann Spies          Telefoon: 021-808 4036
Informasietegnologie, Universiteit van Stellenbosch


     "Seek ye the LORD while he may be found, call ye upon 
      him while he is near: Let the wicked forsake his way, 
      and the unrighteous man his thoughts: and let him 
      return unto the LORD, and he will have mercy upon him;
      and to our God, for he will abundantly pardon."       
                                Isaiah 55:6,7