1. Lookup for the recipient address for certain domains
2. Check if the rcpt address exists in the valias file
3. If these 2 above are true - reject forwarded message
Shortly, something like this:
1. Client configures forwarders through the control panel
The valias file looks like this one:
PATH to it:
/etc/valiases/mydomain.com
content of /etc/valiases/mydomain.com
========================
test@???: techsupport@???
*: :fail: No Such User Here
========================
So the router check for the entries in valiases files and handles the
forwarding:
ROUTER:
=======================
virtual_aliases_nostar:
driver = redirect
allow_defer
allow_fail
data = ${if
exists{/etc/valiases/$domain}{${lookup{$local_part@$domain}lsearch{/etc/valiases/$domain}}}}
file_transport = address_file
group = mail
pipe_transport = virtual_address_pipe
retry_use_local_part
domains = lsearch;/etc/localdomains
unseen
======================
=====================================
I want to setup an ACL which
1. Checks recipient emails address, for example - *@aol.com
2. Checks if such entry exists in /etc/valiases/$domain (in the right
part after ": ")
3. Blocks outgoing emails if the message is forwarded to aol.com
