How to stop emails from nanopool.org: "XMR: Your workers has gone offline"

I've recently switched my XMR (Monero) CPU miner from Claymore to XMR-stak. I've been mining with nanopool-dot-org. Since then I started receiving a lot of the following messages:

https://i.imgur.com/5aUOqyk.png

That reads:

Quote

Subject: XMR: Your workers "" has gone offline

Your worker "" has gone offline.
To check worker`s status follow this link:
http://xmr.nanopool.org/account//

Best regards
http://xmr.nanopool.org

This is an automated e-mail. Do not reply.

Note that I don't see any visible issues with the miner itself.

I clicked on the link in that message and it simply takes me to the graph and stats for my miner. There's nowhere I can see where I can cancel those emails.

Is there a way to stop these messages?