Aleksandar Lazic writes:
On Sam 30.12.2006 16:42, Sam Varshavchik wrote:Aleksandar Lazic writes:The concept is described here: http://www.postfix.org/FILTER_README.html It looks very nice to me ;-)The "NOTE:" under "Principles of Operations" gives away the fact that its approach generates backscatter.Hm, this is possible with any other filter also, it's a problem for the *filter* from my point of view, what do you mean? Isn't it the same as 'user unknown' and some other situation when the recipient isn't reachable on the target mailserver?!
courierfilters do not generate backscatter.
Courier have the option to handle backscatter as far as I understand the page right: http://www.courier-mta.org/courier.html It is also possible to generate backscatter if you use maildrop xfilter with amavis or other mailfilters, isn't it?!
Yes, and it will get nuked by the backscatter filter. But if that's what you want, you can get the same thing by running your filters off maildrop, forgetting the whole thing.
The whole point of using the courierfilter mechanism is that it avoids generating backscatter, but it makes things rather complicated.
One more time: backscatter is accepting a message, and bouncing it. courierfilters do not generate backscatter. If a courierfilter rejects a message, the message will not even be accepted by Courier.
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