This morning I realized I had no sendmail functionality on my web server. This isn’t good, since many programs need to be able to, well, send mail. I had a couple of options. I could install Postfix or Exim, and take on the task of managing a whole mail system, or I could install a “nullmailer”. A simple program that forwards mail to an upstream server for further processing. There are a handful of good nullmailer programs available. The two I’m most familiar with are sSMTP and Nullmailer. Here’s a brief overview of the two.