The chapter contains information you might need only if you are using Cerebro on your local server (see “Local (On-premises) Deployment”).
Cerebro uses email to send different notifications to users and to send/receive Forum messages to/from the so called “email users”, i.e., Cerebro users who don’t have access to desktop Cerebro client.
In case of local Cerebro installation you’ll have to configure a local mailing server as well. Since Cargador serves both as a storage server and mailing server, it’s common to configure it to work on the same machine (see “Cargador Service Installation”). This will simplify deployment procedures, although if you wish, you may set up a different server with Cargador to serve mailing purpose only.