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
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