I know how to remove them all at once on the inReach Mini and also in the Explore app, but after I sync everything they still show up on both explore.garmin.com and share.garmin.com/....
At the moment, I only see the possibility of removing them one by one.
I can also hide them on MapShare but I want to be able to remove them all for easy management and viewing.
Alberto Hello you will want to make sure to delete them from the device, the explore website, and earthmate. Please see the following links for more information.
There is not a way to delete all messages at once on the website. You can delete threads from the inbox tab on the account as well as individual messages from the message box on the map tab.
The answer of organization by threads is worth it to eliminate them in block, thanks for the idea 
