How get I get a better indication that I am in the Linux mail program?
The very basic command line mail program (Mailx) is useful because its
always there. But it has no prompt by default. Adding:
set prompt='mail> '
to the config file /etc/mail.rc
or your personal config file ~/.mailrc
Makes it a bit more user friendly.
By the way here's a crash course on how to use it:
. <enter> will display the current message
h <enter> will display a page of headers
<number> <enter> will display message <number>
q <enter> will get you out