Recently, I’ve received a couple of spam event invitations in Calendar on my Mac. The most recent had only Chinese text, and recurred at 5:46am every day.
I am able to decline these by clicking on the invitations button in the toolbar (that only appears when an invitation comes in). However, ideally I’d like to not receive these spam invitations at all.
As I’ve never received a genuine invitation through Calendar, I thought I might be able to turn off the invitation feature. However, I can’t see any controls for this in Calendar preferences or the Internet Account system preferences.
Through what mechanism do these invitation arrive? If I understood what mechanism it was, I might be able to turn it off. I have two Calendar accounts enabled: iCloud, and Facebook. I can’t see anything in my e-mail, so I presume they’re not regular e-mail spam.
Since first writing this question, I’ve had a similar invitation come through in Reminders: