On Tue, Jul 29, 2008 at 5:49 AM, Carlos Alberto Bernat Orozco <[EMAIL PROTECTED]> wrote: > A lot of this. It appears I'm sending backscatter email. The account > "ber" doesn't even exist and the "from=<>" is impossible to block > until moment. I read the next: > > http://www.postfix.org/BACKSCATTER_README.html > > But here is what I don't know why this happening. > > How can I block this? I know I'm not an open relay. So why is this > happening? I send my postconf
The mails from the log you sent does not seem to be backscatter. In case of backscatter you would get many undeliverable mail notifications, exactly as described here: http://www.postfix.org/BACKSCATTER_README.html#wtf You do not mention what happens to the emails after they are queued. If you are blacklisted I suppose these emails are delivered to their destinations. Try to "grep" your mail log with some mail IDs to see what is happening. Do you have any web server running on the same box where your Postfix is? If yes, it is possible that you have a badly implemented script (PHP, CGI or other) which is used to generate spam. Try to check on that. Zoltan
