I get no mail notification despite having turned it on in the interface and it has run like cronjob via interface - Why? - I have tested with "send test email" and it works. I checked the log:
/var/log/rsync.log
Where in the end:
"sent 5,981,993 bytes received 659,803,930,540 bytes 69,773,162.64 bytes / sec
2019/01/07 23:02:37 [4757] total size is 659,619,363,731 speedup is 1.00 "
So it looks like it has completed full Rsync but no mail: /