On Monday 26 April 2010 18:49:42 The Doctor wrote: > Tracing and tracking. > > Question is: > > If you suspect your web (whether www,http,httpd user )
...of what ? If you mean you suspect a local user of your web server of sending out spam, implement proper local sender restrictions by measures such as limiting which system users can use sendmail submission. > how can you do a header check and pin where the source of > spam is coming from? Header checks will rarely, if ever, tell you where spam comes from. > > All I need is a check that will send to local users - go ahead permit_auth_destination > and if to a massive amount of users It's generally a good idea to limit the number of recipients anyway. > WITHOUT a local user REJECT as spam. How do you mean, "without" ? > > Where can I put this? > I'm entirely unclear what you're trying to prevent here. See http://jimsun.linxnet.com/misc/postfix-anti-UCE.txt for a good introduction to postfix anti-spam measures. J.
