- Previous message: Sudheer MT: "Postfix LDAP - multi site with same domain"
- Next in thread: email builder: "Re: override regular transport?"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ]
|
|
|
From: email builder (no email)
Date: Mon May 23 2005 - 03:43:11 EDT
--- Devdas Bhagat <> wrote:
> On 21/05/05 19:11 -0700, email builder wrote:
> > > it would help if your restate your problem (without any attempt to tell
>
> > > how you would solve it). otherwise, we can only guess.
> >
> > I thought I described it in my first post, but you probably answer a lot
> of
> > email, so does this suffice?:
> >
> > I need to accept mail for mydomain.com at the machine I am working with;
> this
> > machine is to have user-configurable filtering where certain messages
> will be
> > saved off into folders other than the INBOX. Standard fare for an email
> > server.
> >
> > The trick is: anything that would be normally be default then delivered
> to
> > the INBOX is to be relayed to another remote MTA that also thinks it is
> the
> > final destination for the same domain. I do not have control over that
> > machine whatsoever.
>
> So basically, you are a third party deploying a firewall for the users.
> Users need to be able to specify filtering rules on the server, which
> quarantines messages according to those rules. The rest of the email
> should flow through to the primary server. Quarantined messages go to
> individual IMAP folders for each user on the firewall.
>
> What you need is a content_filter, but you are trying to use a LDA for
> that purpose.
I also need user-configurable filters with possible delivery to more than
just a quarantine directory, which only something like procmail or Maildrop
used as LDA will give me as far as I know. If there was a way to kick off
Maildrop as a content filter, um, maybe that'd work, um... maybe? Seems very
strange and maybe will slow postfix a lot.
> I hope this simplifies the problem statement slightly.
It's close, but I need a little more than just a firewall for spam and virii,
but I am *certainly* interested to hear how you think it would be better
done. If I were to JUST implement a "firewall" as you suggest, how is that
best done? Is that something that amavis (wrapped around SA/clamav) can do?
Can amavis redirect those quarantined mails to *per-user* spam and virus
folders?
> I would use a content_filter which accept mail via SMTP, filters
> according to whatever rules are specified, rewrites the envelop
> recipients to ${user}+${extension}@${myhostname}.${original_domain}
> and reinjects via smtpd. Unclassified/unfiltered mail is reinjected
> unchanged.
> $myhostname.$original_domain is in virtual_mailbox_maps (or
> mydestination) as needed.
> $original_domain is in relay_domains only.
I see. Re-written mails are the ones that are stopped at the server, NOT the
ones getting relayed. I assume amavis has functionality to do that kind of
envelope recipient re-writing?
> I hope this helps you in figuring out a solution.
Yes and no. I CERTAINLY appreciate your help. This is a good second
solution for us, but we'd also like user-configurable filters too...
__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com
|
|
|