how to disable mail alert notifications via wt.propertires file

I used to disable the alerts notifications (server sends a lot of alert mails "several <cache_nale"> may be oversized ) via the JConsole , and because , it is a test server ,which restart almost each two days , I have to disable the notifications each time . so My questionn is there a way to disable thos mail notifications in the wt.properties file ,through the xconfmanager command ? I guess if i use the below commad

xconfmanager -t codebase\wt.proeperties -s wt.mail.mailhost= -p olso the workflow notifcations will be disabled .

Thanks in advance.