https://help.boomerangoutlook.com/category/367-troubleshooting
Troubleshooting - Boomerang for Outlook Help
Having trouble with Boomerang? Look here first!
boomerang for outlooktroubleshootinghelp
https://www.boomerangoutlook.com/subscriptions.html
Boomerang for Outlook - Subscriptions
Schedule emails to be sent at the optimal time, get reminders to follow up on messages that don't get a response, and book meetings more efficiently!
boomerang for outlooksubscriptions