Just had an issue where the VM to email were intermitantly not being sent to the users
Found the mail server IP address had not been programmed!
Once i added it lots of old emails started being sent!
So i researched how to clear the email queue so users woundn't have 100's of out of date emails
This how i did it
https://phonesystemhelp.info/micollab-voicemail-to-email-troubleshooting/in case anyone else ever wanted to do something similar