As the mail stated, all customers who have a VM deployed in that region are receiving this email, and your affected machines are listed in that email
See a list of your affected virtual machine(s) in the Account Information section of this email.
So, if you can't see any machine listed in that email, I would expect that none of your machines will be affected by this maintenance window.
If you want to double-check... here is a tutorial/documentation on finding that information in the Azure portal.
https://learn.microsoft.com/en-us/azure/virtual-machines/maintenance-notifications-portal
I hope my answer is helpful to you,
Your
Bjoern Peters
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