My tasks or emails aren't showing up in OmniFocus.
Please go to OmniFocus Preferences -> Synchronization -> Show Sync Details -> and then verify the "Email-to-OmniFocus" is active.
If you do not see the Email-To-Omnifocus option - you need to create a new address in https://manage.sync.omnigroup.com/manage/ and reconnect your Zapier account with the new email and try again!
Go to your page on https://manage.sync.omnigroup.com/manage/ and observe or create your new email:
And ensure it is how you connected to Zapier: