GApps email list blocking

[techlover]

Is it possible to only allow certain people to use certain GApps email
lists? I was able to block an email address from using any email
lists but could not find figure out a regular expression for filtering
to the finer level of control. If any one could give me an example of
a filter for li...@sub.mydomain.com and only thi...@sub.domain.com can
use the list, I would greatly appreciate it.

Larry (Power Poster on GApps forum)

[Evan Hart]

its possible and fairly easy..  But I need to know a bit more info first.
Is li...@sub.mydomain.com in its own sub-org or a sub-org of email addresses that only thi...@sub.domain.com can email to?

[techlover]

Hi Evan. What I did in this example was to assume the user has an
account within my domain and that I had registered a subdomain with
GApps. So the email address is just a normal account within my GApps
account domain. I chose a subdomain because the expression might be
slightly more complicated and both of my Premier accounts are
registered subdomains. There will be cases where I only want to allow
some accounts within my GApps Premier account have access to some of
the email lists. So user1, user2, user3 (all in my GApps
sub.domain.com )might have access to list1, and user4,user5 to list2.
I'm not creating sub organizations within Postini.

There will likely be a few external email addresses that I allow
access to a given email list, e.g. som...@msn.com. The worse
situation would be the case where list members (mixed email addresses)
would be allowed access, e.g. respond to a message. This could be
anywhere from 5 to 70 addresses.

Larry

On Jul 11, 9:57 am, "Evan Hart" <eh...@devnada.com> wrote:
> its possible and fairly easy..  But I need to know a bit more info first.

> Is l...@sub.mydomain.com in its own sub-org or a sub-org of email addresses
> that only this...@sub.domain.com can email to?

>
> On Fri, Jul 11, 2008 at 8:52 AM, techlover <2silverp...@gmail.com> wrote:
>
> > Is it possible to only allow certain people to use certain GApps email
> > lists?  I was able to block an email address from using any email
> > lists but could not find figure out a regular expression for filtering
> > to the finer level of control.  If any one could give me an example of

> > a filter for l...@sub.mydomain.com and only this...@sub.domain.com can

[Evan Hart]

Well being that I don't have a specific example to work with.. and that it sounds like your going to have to setup many of these I will explain the overall idea...

In postini you can create inbound and/or outbound content filter rules (sounds like this is what you've been playing with)

Then you just create your rules one of two ways.
Style 1:
allow if ...condition1...
allow if ...condition2...
allow if ...condition2...
catch-all - block email


Style 2:
or you can do it the opposite way of.
block email if...condition1...
block email if...condition2...
catch-all - allow email (this is the default of course)



so for example if we have 3 emails A,B,C @domain.com
and A can send to the address C but B can't.. then you would create an inbound email rule on account C that has the following rules.
Style 1:
if sender contain A...@domain.com then Allow
if subject contains z or the subject doesn't contain z (aka this rule is the catch all that happens all the time) then Block
(If/when an email comes in thats from A...@domain.com to C...@domain.com you'll notice that both rules apply. In this type of situation Postini will apply the least sever rule, so in this case allow, which is what you want)

Style 2:
if sender doesn't contains A...@domain.com then block


Let me if you have any questions...