Postfix resent messages detection

2012-02-17 Thread Simon Hintermann
Hello all, here is my problem: I have several hosting servers, sending mails from authenticated users, web scripts, web pages, and so on... I cannot monitor everything, and our greatest problem is outgoing unauthorized mails. we experience 10'000 mails spam campaigns every week or so... No ne

Re: Postfix resent messages detection

2012-02-17 Thread Reindl Harald
Am 17.02.2012 17:00, schrieb Simon Hintermann: > Hello all, > > here is my problem: > > I have several hosting servers, sending mails from authenticated users, web > scripts, web pages, and so on... I > cannot monitor everything, and our greatest problem is outgoing unauthorized > mails. we e

Re: Postfix resent messages detection

2012-02-17 Thread Simon Hintermann
Le 17. 02. 12 17:06, Reindl Harald a écrit : Am 17.02.2012 17:00, schrieb Simon Hintermann: Hello all, here is my problem: I have several hosting servers, sending mails from authenticated users, web scripts, web pages, and so on... I cannot monitor everything, and our greatest problem is o

Re: Postfix resent messages detection

2012-02-17 Thread Reindl Harald
Am 17.02.2012 18:31, schrieb Simon Hintermann: > Okay... perhaps I explained it poorly, or did I actually not understood a > word of your explaination... > > > The case I cannot detect is: > > > SENDER (a...@toto.com) sends an email to b...@domain.com > || > v > WEBSERVER (b...@domain.com f

Re: Postfix resent messages detection

2012-02-17 Thread Toni Mueller
On Fri, Feb 17, 2012 at 06:35:11PM +0100, Reindl Harald wrote: > Am 17.02.2012 18:31, schrieb Simon Hintermann: > > SENDER (a...@toto.com) sends an email to b...@domain.com > > || > > v > > WEBSERVER (b...@domain.com forwards all mails to b...@yahoo.com) > > || > > v > > MAIL GATEWAY (local domai

Re: Postfix resent messages detection

2012-02-17 Thread Simon Hintermann
Le 17. 02. 12 18:35, Reindl Harald a écrit : Am 17.02.2012 18:31, schrieb Simon Hintermann: Okay... perhaps I explained it poorly, or did I actually not understood a word of your explaination... The case I cannot detect is: SENDER (a...@toto.com) sends an email to b...@domain.com || v W

Re: Postfix resent messages detection

2012-02-17 Thread Reindl Harald
Am 17.02.2012 18:41, schrieb Toni Mueller: > > On Fri, Feb 17, 2012 at 06:35:11PM +0100, Reindl Harald wrote: >> Am 17.02.2012 18:31, schrieb Simon Hintermann: >>> SENDER (a...@toto.com) sends an email to b...@domain.com >>> || >>> v >>> WEBSERVER (b...@domain.com forwards all mails to b...@yah

Re: Postfix resent messages detection

2012-02-17 Thread Reindl Harald
Am 17.02.2012 18:48, schrieb Simon Hintermann: > Okay, the webserver is a Plesk server where users can set an email > redirection to their external address. I don't > know why, but many users do that. i am out here because i never use such software using server configuartions natevily all of th

Re: Postfix resent messages detection

2012-02-17 Thread Wietse Venema
Simon Hintermann: [restricting the sender address from webmail apps with an SMTP sender access table] > Now I get a warning in my logs every time a potentially unauthorized > mails goes out. > > But I can't have any visibility over redirected mails. We've got several > users that configure their

Re: Postfix resent messages detection

2012-02-17 Thread Simon Hintermann
Le 17. 02. 12 19:02, Reindl Harald a écrit : Am 17.02.2012 18:48, schrieb Simon Hintermann: Okay, the webserver is a Plesk server where users can set an email redirection to their external address. I don't know why, but many users do that. i am out here because i never use such software usi