Looking to gather statistics on email received and sent

I am working on rebuilding a mail server that handles lists.

I moved all list data to postgres and it works great.

Management is asking if its possible to use the postgres database to store list usage information.

I was wondering if I could do this as part of the router.?   Maybe something like:

Some_config = ${lookup pgsql \
      {INSERT INTO listman.stats \
        VALUES \
         ('${quote_pgsql:$local_part}'}
 } 

Or something similar, or am I crazy?  

Thoughts?

Thanks in advance.


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