[Mimedefang] Re: Re: Cloning/Splitting Mail at SMTP level (Les Mikesell)
Albert Croft
acroft at cyber-wizard.com
Wed Mar 7 14:28:44 EST 2007
>
>
>Today's Topics:
>
> 4. Re: Cloning/Splitting Mail at SMTP level (Les Mikesell)
>
>
>----------------------------------------------------------------------
>Message: 4
>Date: Tue, 06 Mar 2007 14:23:40 -0600
>From: Les Mikesell <les at futuresource.com>
>Subject: Re: [Mimedefang] Cloning/Splitting Mail at SMTP level
>To: mimedefang at lists.roaringpenguin.com
>Message-ID: <45EDCDCC.2070802 at futuresource.com>
>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
>David F. Skoll wrote:
>
>
>>> Jeremy Phillips wrote:
>>>
>>
>>
>>>>> After a couple hours of searching on the Internet I've come up with
>>>>> this mailing list, and was wondering if anyone has used MIMEDefang in an
>>>>> application similar to this situation? Can MIMEDefang do these
>>>>> processes at the SMTP level so mail that comes in get's scanned by our
>>>>> spam appliance, and also send to another external account for analysis?
>>>
>>>
>>>
>>> Sure. Pseudocode in filter_end:
>>>
>>> foreach my $recip (@Recipients) {
>>> add_recipient(localpart($recip) . '@test.example.com');
>>> }
>>>
>>> You then configure a box to accept mail for "test.example.com"
>>
>>
>
>Is anyone doing something like this to have archive/backup copies or
>comply with email retention regulations? In that case you'd have to
>treat local and remote recipients differently.
>
> -- Les Mikesell lesmikesell at gmail.com
>
I had a customer a little over a year and a half ago who had the
requirement that supervisors get copies of emails received by their
first-level subordinates (example illustrated below). I installed
mime-defang, modified a mimedefang-filter to stream_by_domain, disabled
the filtering normally done (which was being done on other servers
instead), created a couple of database tables, and edited filter_end()
to look at the addresses present, look up to whom copies should be
forwarded, then executed appropriate add_recipient() commands as needed.
The code only looked at those addresses in @Recipients that matched a
pattern I had for their domain name, and all the management of who to
forward from/to is taken care of in database tables (which could (at
some point) have a nice front-end wrapped around it (a year later, and
that's still on my list-php*admin works, though)).
Example:
Joe is Bob's supervisor
Bob is Steve's supervisor
Expected behavior:
If email to Bob, Joe should receive a copy
If email to Steve, Bob should receive a copy, Joe should not
receive a copy
(My code for this was a bit ugly, but it has worked so far. If you're
interested, contact me off-list.)
-Albert C.
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