The steps below will allow you to delete messages from a message thread. Please note that you cannot delete entire message threads at once. Lastly, deleting a message from the Explore portal will not remove the message from the inReach device.
1. Login to explore.garmin.com.
2. Click on the Inbox tab.
3. Click on the garbage can beside a message.
4. The message will be delete from the Explore portal.