I tried this plugin, which seems to do a great job.
I don't want all the plugin's data and logs to be saved in the db, so I set the 'Data Save Method' to File.
This way - I do not get any email notification (when saving to database - I do get them).
I've tried to temporarily change the permissions of the folder
wp-content/plugins/wordpress-file-monitor-plus/data/ to 777
Then I see after a check a new file is being written (.sc_wpfmp_scan_data) but still there is no mail sent (and I changed some files in order to have some changes to report).
I'd appreciate your help setting up this plugin.