On Thu, Oct 20, 2011 at 12:27:27PM +0200, Daniele Nicolodi wrote: > Hello Dennis, thank for your comments, they are much appreciated. > I hope I understand enough to formulate a valid reply.
It looks quite good (at least to me as a native german). > On 20/10/11 12:08, Dennis Guhl wrote: > > On Thu, Oct 20, 2011 at 10:31:50AM +0200, Daniele Nicolodi wrote: [..] > My point is that no backscatter is generated from the use of > spamassassin as content filter. The back scatter is generated from the Indirect yes. > rejection of an email in the content filter. If I explicitly instruct > spamc to tell postfix to reject the email based on the spamassassin In most cases this is the configured and intended behaviour. But this is not the only option you have to treat a spammy email. > rules, then, I would have backscatter. My English is maybe not very > good, but I find the above statement confusing, because at a first read > it may look like that the filtering itself may cause backscatter. Indeed this might be a language barrier. [after queue rejection == backscatter] > That's exactly the point. My spamassassin does not tell postfix to > reject the email, I simply discard it, without notice to the sender, as This is a way to handle spam. But I see two problems: first and foremost, you will have false positives (ham detected as spam), and nobody will know about this as the sender only see that your MX accepted his email and the recipient never knows about the email. The second issue may regard the law. At least here in Germany we are not allowed to discard an email we acceptet beforehand. I don't know italic laws or if european laws say something about suppression of (e)mails. [..] > What is the recommended way to use spamassassin to reject emails at the The (TM) recommended way does not exist ;) > SMTP level? A few have been suggested in this thread, but honestly I do > not have time to try them all. Simplicity, assuming a low volume smtp > server, is highly appreciated. In this case I would recommend spamass-milter (http://savannah.nongnu.org/projects/spamass-milt/) HTH Dennis
