Changing "send-from" e-mail address

[AndyBr (Andy)]

root@DO-Discourse:~# free -h
              total        used        free      shared  buff/cache   available
Mem:          965Mi       705Mi        72Mi        16Mi       187Mi        91Mi
Swap:         2.0Gi        17Mi       2.0Gi
root@DO-Discourse:~#