Prevent spam by adding invitations from known senders only to your calendar

Quick summary

To help keep your Google Calendar free from spam, you can now select an option to display events on your calendar only if they come from a sender you know. If you select this option, you still get email event invitations from unknown senders, but they appear on your calendar only after you accept.

Senders you know include:
  • People in your same company domain (like
  • People in your contacts list
  • People you’ve interacted with before
As before, you can also choose to have all invitations appear on your calendar, or only those you’ve accepted—letting you customize the display to best meet your needs. 

Additionally, admins can set the default reply option for their users in the Google Admin console. Note that end users can indicate their preference in their own Calendar settings.

Getting started 

Admins can set the default option for all organization users

Rollout pace 


  • Available to all Google Workspace customers, as well as legacy G Suite Basic and Business customers 
  • Available to users with personal Google Accounts