> > Josip Rodin wrote: > > On Wed, Nov 29, 2006 at 11:42:10AM -0500, Dean Brooks wrote: > > > >> Keep in mind that there *are* sites out there that: > >> > >> - Dont ever retry at all > >> - Retry only once after one hour > >> - Retry once only every 24 hours > >> - Treat temporary errors as failures > >> - etc. > >> > > > > I recently encountered one ISP which retries in fifteen > minute intervals, > > but only three times, before it gives up. Wackos. > > > > > > And therein lies the rub. I think the solution is to apply > greylisting > selectively rather that to everyone. Suppose that you only applied > greylisting to hosts that: > > Have bad RDNS > In home/dynamic IP ranges > Fail and header test > Has any slightly weird HELO > Mail From:<> > Listed in Blacklists like Spamcop that are not good enough to block on > > What that you will probably block almost as much spam without > the delays.
In its simplest form this is a fantastic idea, thank you. Of course you would want to greylist given the fact that you have a reason to do so. I am going to immediately try to figure out how to set up the ACL to try this out. -- ## List details at http://www.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://www.exim.org/eximwiki/
