Additional Info: yes, -v9 for debug is working, but -v0 / -v1 for errors only is not: it is the same as -v5
Lower the verbosity seems not working
I have exactly the same problem. Goal would be receive only cronjob duply mail, if there are warnings and/or errors. -v1 or --verbosity 1 or VERBOSITY=1 in conf, all of them are not working. The output is still the full status as described above by Seidel. Now, what to do, to only receive cronjob mails if a backup job fails?