You can unwatch that thread to stop receiving email notifications. Or disable on your preferences «E-mail me on replies to a thread I am watching»

Yes, all that needs to be added *within* the email.
More importantly, a "standard" explanation "of how to unsubscribe" needs
to me added to such emails.

Indeed, even this bugzilla needs it.

I was trying to be helpful. I disagree from your last statement. Copying the notification I got for your last comment:

Configure bugmail: https://bugzilla.wikimedia.org/userprefs.cgi?tab=email

• You are receiving this mail because: -------

You are on the CC list for the bug.

Yes, but consider a user who has left a project for several years.
He would be looking for 'to unsubscribe' links, and nothing more technical...
However 'Configure bugmail' I suppose is better than nothing, agreed.

This is already provided:

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