Re: Blocking a particular authenticated user

2010-09-02 Thread Stefan Seidel
On Wed, 1 Sep 2010 16:33:31 -1000 (HST), Julian Cowley wrote: > Hello, > > I would like to block a particular user who is authenticated using > SASL from sending mail. Is there a way to do this? > > I found one way to do it, but it is not perfect. I can block the > the email address of that us

Re: Postfix forwarding may result in backscatter

2010-08-31 Thread Stefan Seidel
On Tue, 31 Aug 2010 13:45:25 -0400 (EDT), Wietse Venema wrote: > Stefan Seidel: >> I was actually in favour of using SRS as I also use SPF and it is often >> mentioned that SRS is needed for SPF to work across forwarding, however >> everything I found on the internet told m

Re: Postfix forwarding may result in backscatter

2010-08-31 Thread Stefan Seidel
On Tue, 31 Aug 2010 17:39:50 +0100, Simon Waters wrote: > On Tuesday 31 August 2010 16:57:16 Stefan Seidel wrote: >> >> Additionally, the mail is also stored to a local >> mailbox. I know, that means that users could fetch them via >> POP3/IMAP/Webmail, but as it

Re: Postfix forwarding may result in backscatter

2010-08-31 Thread Stefan Seidel
On Tue, 31 Aug 2010 11:20:37 -0400 (EDT), Wietse Venema wrote: > Stefan Seidel: >> This forwarding to external addresses however, makes my Postfix create >> backscatter. Example: >> hijac...@yahoo.example.com sends email to u...@mysystem.com -> >> virtual_

Postfix forwarding may result in backscatter

2010-08-31 Thread Stefan Seidel
Hi, I am using Postfix for some time now and up to now I could always make it behave the way it should. However, I have a problem now: I use virtual_alias_maps (with mysql backend, not that it would matter) to sort mail into local user's mailboxes, but also sometimes to forward mail to external m