<OT> sendmail guru help needed

[Matthew Carpenter]

It sounds like you have some issues to resolve:

It looks like you have to have the mail delivered directly to "sendmail"
in order to filter spam...  

You sound like you DON'T want everyone's mail to get SPAM-filtered, just
the 25 in your pilot?

If these two assumptions are correct, as well as what you said about not
being able to have the email addresses change, good luck if you want to
use BLs...  I don't know much about the MILTER subsystem, but David
Bandel knows a bit about it.  

You have a couple different methods you could use:
* Mail comes to "sendmail" and somehow all non-pilot mail is forwarded
to the GroupWise box.  This would allow the mail to be intelligently
dealt with, but as you said, MILTER would be applied to all the mail.

* Mail comes into the GroupWise MTA and the pilot email accounts are
configured to forward email to the "sendmail" box.  This would allow the
production system to be left alone and only affect the email accounts in
the test.  While this may seem best for the moment, I don't recommend
running ANY of the Big-3 directly connected to the Internet (GroupWise,
Lotus Notes, Exchange), but recommend a *nix MTA (Sendmail, Postfix,
etc...) in front to deal with the "naughties".  GroupWise, in
particular, doesn't protect it's SMTP relaying very well (if enabled).

* Mail comes into a third box out in front of both the GroupWise and
"sendmail" systems and routes the mail to the right mail server.
This is the ideal situation regardless.  However you choose to route the
email to the appropriate email system, having a "Firewall" MTA in front
of your main system provides the raw power and security (yes, I said
Security) of Sendmail of its siblings.


As for routing of email, it kinda depends upon which of the above setups
you use.  

1)If you use my preferred method, you have a lot of choices. 
* You should be able to set up routing for the @company.com to send mail
to the GroupWise server, and set up aliases for the other email
addresses to the sendmail box.  This can be done by adding 
  testuser1:	testuser1 at sendmail.company.com
into /etc/aliases for each user in the pilot (don't forget to run
"newaliases" or the equivalent after changing /etc/aliases)

* If you have the Sendmail server out front to control relaying, you can
turn on POP3 on the GroupWise server (if the relaying issue was what
kept it off anyway) and use Fetchmail on the sendmail server.

* There are other methods which I have not had to use.  

2)If a front machine is not an option, I would probably just forward the
mail from the GroupWise accounts.  This would limit the use of RBLs
(which, I must say, have chopped my SPAM to MAYBE 1 or two every few
months-pulling email address off my web site) but if MILTER is what I
think it is, this won't matter.  David, could you speak to that one?



On Fri, 18 Oct 2002 11:55:29-0400 Bruce
Marshall<bmarsh at bmarsh.com>(by way of Douglas J
Hunley<doug at hunley.homeip.net>) wrote:

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> On Friday 18 October 2002 10:07 am, Douglas J Hunley wrote:
> >How about using procmail to grep a list of names....   if the name is
> >not found, the email gets forwarded to the other server.
> 
> that would work, except that I'm trying to sell mgmt on using the
> MILTER interface to allow virus scanning, and spam tagging. that would
> happen before procmail even got a hold of the mail...
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