I have what I imagine is a common situation on my Backup MX server where spammers send email to the machine and then Sendmail politely sends out various responses back to the nonexistant spammers addresses to attempt to let them know that something has gone wrong with their mail delivery. I'd like to take a closer look at the contents of these email so I am trying to decide the best way to do it. I wonder if there is a way to tell sendmail to store a copy of all of these emails locally??? or would it be better to use a packet capture tool?