What is the limit on streams?
Here's what I'm intending to do and perhaps someone has a better solution:
I have a list of email addresses for a virtual email host:
[EMAIL PROTECTED]
[EMAIL PROTECTED]
[EMAIL PROTECTED]
[EMAIL PROTECTED]
[EMAIL PROTECTED]
I want to group by domain, append an ' OK' and insert a '$domain REJECT' after
each domain block. The output should look like this:
[EMAIL PROTECTED] OK
[EMAIL PROTECTED] OK
[EMAIL PROTECTED] OK
happy.com REJECT
[EMAIL PROTECTED] OK
blah.com REJECT
[EMAIL PROTECTED] OK
test.org REJECT
I want to process the input once for scalability. Right now I have a small
perl script that opens up 1 through # of domains as streams (ie >&1, >&2,
>&3). Then I intend to capture these streams in order. The streams are all
stored in a hash. However something tells me this is only an exercise in
stream fun and not the ideal approach. Pseudo code, Perl or shell solutions
are welcome.
Here's a naive way I could do this with bash, however it calls ldapdump
repeatedly. ldapdump is a perl script that dumps all email addresses from an
ldap server.
( for i in `cat destination_domains` ; do
ldapdump | egrep $i | sed -e 's/$/ OK/'; echo $i REJECT ;
done ) > valid_local_senders
Finally, here's why: Postfix has the capability to reject email for addresses
that don't exist on it's local domains. However it does not have the native
configured ability to reject email "From: " non-existent addresses on it's
local domains. Well I figured out how to configure it. Now for a specific set
of domains that the local mail server is responsible for, email must be either
to or from valid users.
Cory
--
Cory Petkovsek Adapting Information
Adaptable IT Consulting Technology to Your
(858) 705-1655 Business
[EMAIL PROTECTED] www.AdaptableIT.com
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