and the 'email@example.com' was used as 'From:' when I issued a mail like echo -e "Hi there" | mail -s Test firstname.lastname@example.org
In a new installation of Ubuntu 18.04, the 'From:' is now
where clearname is the name string in /etc/passwd, username is the linux username, and hostname is the linux host name (although changing it with 'hostname' does not alter the result).
Of course, this e-mail address is not going to work, I would like to supply my real address. It seems like new versions of GMail or SSMTP have broken this useful and essential feature.
I would be grateful for help!