I know that I can send email with the mail command. Something like echo Hello world | mail -s Hello world foo@bar.com would do the trick. But, given that I and a partner are online, how can we communicate with each other receiving and sending email only using the command line?The idea is to send and receive emails messages between two computers (with known IPs, and eventually with dynamic DNS), so that each can monitor the work of the other, and that without connecting through an email provider like yahoo.com, gmail, or hotmail.
Using an email without email services
command line;email