Dan wrote:
2008/2/11, Håkon Alstadheim <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>>:
Dan wrote:
> I think you are right, I will do it this way. I don't remember why I
> didn't do it this way (believe I was in "howto" mode and just
> following some how-to too literally ;-))
Most of the howtos you stumble upon when searching for postfix and
dspam
are geared towards pure filtering installations without local
delivery.
I recently posted here on how to filter on incoming mails before alias
expansion. If you run mailing-lists you want to filter, you need
to run
dspam as a filter, before local delivery. If you only filter for local
recipients, mailbox_command or mailbox_transport are way simpler.
Yes.
Though after starting to get this going, I realised that this also
does not 100% match my needs. Admittedly my setup is a bit
complicated, as after the initial postfix are multiple email systems.
The "local" one is a cyrus IMAP server, but some users get their mails
also delivered to other (LAN-local) mail servers we run for different
projects (e.g. an Exchange server). Ideally dspam would work for them
as well. But then there may even be addresses that are split to go out
to other servers outside of our LAN (which should not be filtered). Argh.
The latter aside, the content filter may not be good as it uses the
resolved forwarding address. This is wanted for aliases, but not
wanted for forwards (esp. multiple ones), as the user would not
necessarily know the internal addresses.
Argh. I think this is something that is rather difficult (if at all)
to achieve. Maybe the best would be to use the mailbox_transport
method, so anybody who wants email to be filtered & forwarded to other
mail systems must do the forwarding in cyrus (should be no big problem
with web sieve). Or is there some way to achieve the complicated?
Dan
I don't think there is one "set-and-forget" solution if you need
anything more fancy than "relay only" or "local mailbox only".
Getting a good setup when you have both local and non-local users WILL
involve some manual settings per recipient or some sub-optimal solutions
or both. A bit of scripting to add recipients to some categories of
users could possibly get you most of the way to a perfect solution. The
scripts would need to add users to various map-files for postfix,
turning on or off filtering for individual recipients before or after
alias-expansion ("after alias expansion" means "during local delivery").
The all important thing in such a setup is having a clear design, and
sticking to it :-).
