On 9/23/2009 1:05 PM, Xn Nooby wrote:
Hello, I am trying to determine the best way to limit who my users can
email. I am using a Redhat/Squirrelmail/Dovecot/Postfix
configuration. I have 3 categories of users, and each category has a
separate "address book" in Squirrelmail, and I need to limit who the
user can send mail to the addresses in their classes address book.
I programmatically generate the 3 address books, so I can easily
create the files in another format more friendly to Postfix.
I believe I need to create 3 classes of users in Postfix, with each
class having their own list of valid recipients they can email. The
tests in Postfix would first determine which class the sender was in,
and then determine if their recipient was valid. I'm dealing with 3
classes of about 1000 users, with each class having about 100 valid
addresses to choose from. I am guessing I should use hash tables
instead of regular expressions, so it would be faster.
Does this sound like the right approach?
Yes, this sounds about right. The basic formula is described
here:
http://www.postfix.org/RESTRICTION_CLASS_README.html#external
Note that your squirrelmail must be configured to submit mail
via SMTP for these checks to be effective.
-- Noel Jones
