Send an email from the terminal when job finishes

some_program.sh; echo "some_program.sh finished running" | mail -s "Job Status Update" username@gmail.com

This can also be used when a program is already running

some_program.sh

[Ctrl]  Z 

[1]+ Stopped some_program

fg ; echo "some_program.sh finished running" | mail -s "Job Status Update" username@gmail.com