I would like to setup a SMTP proxy/filter box which simply sits in between the real server and the internet. All incoming mail passes through the filter, and all outgoing mail also passes through the filter.
Basically the box will do a single job, it will have all the domains handled by the organisation listed in the $mydomain and the rule processing will be that it looks at the To and From only, it then compares each one to $mydomain. If one header matches $mydomain (say To:) then it looks at the other for comparison, if it is not listed in $mydomain it then strips the domain from that address and it copies the email and sends it a new email address based on it going to an address within the organisation. For example: The organisation has mydomain.com as their $mydomain. They email someone at postfix.org. Or someone from postfix.org emails someone at mydomain.com The filter box matches the To/From as not being in $mydomain and creates a copy of the email and sends it to postfix....@mydomain.com which is handled by the authorative mail server. The original message goes on its merry way uninterrupted and the copy is routed back internally The authorative mail server then does as it pleases based on that email address. All emails to and from a domain are then collected at a single mailbox for an extensible journaling purposes based on the email address. Any ideas would be appreciated.
