I realize this 2014 blog post showing how to setup sendmail on a Rapsberry Pi is a bit outdated, but, am I stretching too much to expect the following command to work on my new Buster / Raspberry Pi OS?
Here's the part of the instructions I was following:
Save the authinfo file and use makemap to create the binary version. The following command creates a file called “authinfo.db“, using the information you placed into authinfo.
And this command is what I'm trying to do:
# makemap hash /etc/mail/authinfo < /etc/mail/authinfo
All I get is command not found, even if I prefix it with sudo