In this article, we'll explain how to stop spam in calendars on your iPhone. You'll also find information on how to delete spam invitations and spam calendars.
How to Delete Calendar Spam on Your iPhone — Apple Support
Spammers are smart, and it didn’t take long for them to figure out that they could send random calendar invites to iPhone users to facilitate a phishing scam or other malicious tasks. And so calendar spam was born. The question now is: how do you get rid of it?
You may not be able to completely stop spam in your calendar, but there are a few strategies you can use to reduce the amount of spam in your calendar.
First, you need to know how to deal with spam calendar invites. It’s natural to want to open them and click on the link to decline the invite, but don’t. When you click on a reply button or link in a calendar invite, you’re letting the spammer know that the email address they used is active. Suddenly, the spam level in your calendar and your email will double or triple because your information is being put on an “active” list and sold and resold. So if you receive an invite that you don’t recognize, delete it immediately.