How to prevent spammers from attacking your Google Calendar



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Google Calendar spam event

Spammers have found a way to add unwanted phishing and scam events to people's Google calendars without their permission. Here's how to prevent spammers from adding items to your calendar without your permission.

As explained in detail about Whitson Gordon, former editor of How-To Geek, Google Calendar (by default) displays event invitations, whether or not the user has accepted them. Spammers use this flaw to overwhelm the calendars of people with malicious links and other derogatory texts.

Stop the calendar by adding invitations automatically

One of Google Calendar's default settings is to automatically add invitations to events in the calendar. To disable this option, click on the gear icon in the upper right corner of the screen and select "Settings".

Google Calendar Click Gear and Settings

Then choose "Event Settings" in the left sidebar.

Google Calendar Select Event Settings

Look for the drop-down menu labeled "Automatically add invitations". Click on the arrow.

Google Calendar Select Automatically add invitations

Finally, select "No, only show the invitations I have answered".

Google Calendar Select No. Only the invitations answered.

Stop the calendar since adding events from Gmail

Google Calendar also extracts events directly from Gmail. If someone sends you an invitation via email – sometimes even when it is sent to the junk folder – this is reflected in your calendar. To disable this feature, return to the Settings menu by clicking on the gear icon and selecting "Settings".

Then choose "Gmail Events" in the left sidebar.

Google Calendar Select Events in Gmail

Uncheck "Automatically add Gmail events to my calendar".

Google Calendar to disable automatic Gmail events

Google Calendar will ask you to confirm this action. Click "OK" to approve the change.

Google Calendar Select Confirmation OK

Hide rejected calendar invitations

If you have read and declined unsolicited calendar events, they will still be displayed in Google Calendar, but they will be barred. The reason is that it continues to display the denied events by default.

To turn off this feature, return to the Google Calendar Settings menu. As mentioned earlier, you get there by clicking on the gear icon and selecting "Settings".

Once there, choose "Display Options" located in the left sidebar.

Google Calendar Select Show Options

Clear the "Show Rejected Events" check box to remove the reduced invitations.

Google Calendar disable the display of rejected events

Hide denied events on mobile

Curiously, when you decide to hide the denied events from the desktop view, they always appear in Android, iPhone and iPad applications. If you want them not to be displayed, start the mobile app, open the overflow menu by tapping the burger icon in the upper left corner, scroll down and press "Settings".

Google Calendar Mobile Settings

Then select "General".

Google Chrome Mobile Click General Edited

Finally, disable "Show Rejected Events".

Enable / disable Google Calendar Mobile Calendar to view denied events


A increasing number of people online reported that this tactic was used to spam their Google calendars. At the time of writing this article, Google has not released any incident response. However, some of these default settings will be disabled in the future.

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