How do i stop DFN backscater

2012-02-19 Thread Przemysław.Orzechowski
Hi One of my clients made a setup that all her mails are forwarded to remote ISP Unfortunatly i noticed that sometimes i get 450 error from destination ISP this triggers Delivery Failure Notice wich is naturally sent to this ISP Is there a way to stop this endless loop ? Im using postfix 2.5.8 I

Re: How do i stop DFN backscater

2012-02-20 Thread Przemysław.Orzechowski
On Mon, 20 Feb 2012 04:30:55 -0600, Stan Hoeppner wrote: > On 2/20/2012 12:10 AM, Przemysław.Orzechowski wrote: > >> One of my clients made a setup that all her mails are forwarded to remote >> ISP >> Unfortunatly i noticed that sometimes i get 450 error from destination

Re: How do i stop DFN backscater

2012-02-20 Thread Przemysław.Orzechowski
On Mon, 20 Feb 2012 07:00:11 -0600, Stan Hoeppner wrote: > On 2/20/2012 5:45 AM, Przemysław.Orzechowski wrote: > > >> Feb 19 10:47:27 panel2 postfix/smtp[10854]: 56F7A8ED0DC: >> to=, >> relay=mx.poczta.onet.pl[213.180.147.146]:25, >> conn_use=7, delay=24703

Re: Blocking users sending spam

2016-11-15 Thread Przemysław.Orzechowski
On Tue, 15 Nov 2016 14:09:03 +0100, Volker Cordes wrote: > Hello, > > I just stopped our server from sending out spam mails. A password from > one of our customers was hacked or somehow leaked so that the mails were > sent by an authenticated user. Now I was wondering if it is possible to > bloc