Spam on your Outlook calendar? Here's the fix Microsoft doesn't have

If you use Outlook, Hotmail, Live, or MSN, you've probably seen it. A spam email arrives, goes straight to Junk, and somehow there's now a meeting on your calendar for a crypto giveaway or a package you never ordered.

Microsoft's own support forums say there's no way to stop it on a personal account. That's true if you only use Outlook's settings. It isn't true any more. Leave Me Alone can block the email and remove the calendar event in the same step.

Why spam ends up on your calendar

Outlook adds any meeting invite to your calendar the moment it arrives. It doesn't check who sent it, and it doesn't care whether the email went to your inbox or your Junk folder. The event appears as tentative, and it stays there.

Deleting the email doesn't help. Outlook treats the email and the calendar event as two separate things, so the event stays behind after the message is gone. Blocking the sender doesn't help either, because spammers change addresses every time.

How to stop them with Leave Me Alone

Our Spam Blocker watches your inbox and moves spam out of the way before you see it. For Outlook accounts, it can now remove the calendar event too.

1. Connect your Outlook account to Leave Me Alone and turn on the Spam Blocker.
2. Switch on "Also remove calendar invites from blocked emails" under Options on the Spam Blocker page.
3. Reconnect your account when we ask. Microsoft will show one extra permission for your calendar. Accept it and you're done.

From then on, when we block an email that contains a meeting invite, we remove the event it created. The email goes to your blocked folder, nothing is deleted, and we never reply to the sender. Declining a spam invite tells the spammer your address is real, so we don't do that.

We only ask for calendar access if you turn this on. If you never switch it on, we never ask.

Stop calendar spam for free

Using Gmail?

You don't need any of this. In Google Calendar, open Settings, go to Event settings, and set Add invitations to my calendar to Only if the sender is known. Spam invites will stop appearing.

FAQ

Why do spam invites appear on my calendar even when the email is in Junk?

Outlook processes meeting invites when the email is delivered, before the junk filter has any say. The event is created whether the message lands in your inbox or in Junk.

Does deleting the spam email remove the calendar event?

No. Outlook keeps the email and the event separately. Deleting one leaves the other in place. The event has to be removed from the calendar itself.

Why doesn't Microsoft block these?

There's a setting in Outlook called Events from email. It controls whether Outlook creates events from flight confirmations, hotel bookings, and deliveries. It has nothing to do with meeting invites, so turning it off won't stop calendar spam. Plenty of people try it first and wonder why it didn't work.

You can block individual senders under Settings, Mail, then Junk email. That stops repeat offenders, but spam invites usually come from a new address every time, so it turns into a game of whack-a-mole.

Gmail solved this years ago with a setting that only adds invites from people you know. Microsoft hasn't added the equivalent for personal accounts. Only businesses with an IT admin and Microsoft 365 can block external invites, using mail flow rules that aren't available to the rest of us.

Will the spammer know I've removed the invite?

No. We remove the event without sending a response, so the sender gets nothing back. Declining in Outlook does send a response, which is why we don't recommend it.

What about invites already on my calendar?

We handle new mail from the moment you turn this on. Anything that landed before that is still there, and clearing it takes a minute. Open your calendar in Outlook, right-click the event, and choose Report, then Junk. Don't click Decline, for the same reason as above.

Does this work with Hotmail, Live, and MSN addresses?

Yes. They're all Outlook.com accounts under the hood, and the fix works the same way for each.

What permission do you need, and why?

To remove an event we need permission to read and write your calendar. We only ask for it if you turn this option on, we only use it to remove events created by emails we've blocked, and you can take it back at any time from your Microsoft account.

What happens if you block a real invite by mistake?

Rescue the email from your blocked folder and it goes back to your inbox. Open it and click Accept to put the event back on your calendar. Rescuing also teaches the Spam Blocker to trust that sender.