Testing Load with smtp-source and top In order to evaluate the load on your box you can run smtp-source and combine that with snapshots of top to evaluate the load on the server.  Now open two terminals and in one run the smtp-source command and in the  other snapshots for top. Terminal #1 # time /usr/sbin/smtp-source -s 40 -l ...

One of the questions that you will want to solve is how much mail traffic can your hardware handle.  This is often why people overbuild hardware is that they just are not sure and no one wants to build a mail server and then rebuild in 3 months.  Fortunately, Postfix comes with a couple programs that you can stress your server with and get a general idea of what you need. Hardware Considerations When you are building a mail server, especially if you ...