Troubleshooting Google Calendar Invites

Luma should automatically add your events to your Google Calendar. You can see how that works and see how to troubleshoot it.

When you register for an event, you’ll receive a confirmation email with an attached Calendar ICS file. That email should automatically add the event to your calendar (Google Calendar / Outlook).

If you are finding that events are not appearing on your calendar, you can do a few things to debug this:

Hit Yes on a Luma Calendar Invite

Google has rolled out restrictions to Google Calendar to defend against spam. You can let Google know that you expect to receive emails from Luma by hitting “Yes” on the calendar invite in GMail.

Update Google Calendar Invite Settings

You can update your Google Calendar Settings to allow receiving invites from everyone.

Add [email protected] to your Contacts

We send all registration confirmation emails from [email protected] — you can add this email to your Google Contacts to give Google another sign you expect to receive emails from Luma.

To add someone to your contacts, hover over their name in GMail until a tooltip appears. Then hit the “+” icon.

Add Your Personal Calendar to Google Calendar

You can add all of your Luma events to your calendar in one click from your Luma Settings page.

When you add an iCal subscription to Google Calendar, it will appear as a separate calendar and will be updated independently of the emails we send. Note that Google Calendar refreshes iCal subscriptions roughly every 12–24 hours, so recent changes (like new registrations or declined events) may take time to appear.

For more details on how iCal subscriptions work, see iCal Syncing.

Gmail Shows Event Has Been “Canceled”

If you deleted or declined a Luma event from your Google Calendar and later receive a new calendar invite for the same event (for example, after an event update or being re-added as a host), Google Calendar may show the event as “This event has been canceled” — even though the event is still active.

This is a Google Calendar limitation, not a Luma issue. Google remembers that you previously removed the event and treats any new invite for it as canceled. This only affects your calendar — other guests and hosts will see the event normally.

To work around this, try adding your Luma iCal subscription to Google Calendar instead. The iCal feed syncs independently of email invites and won’t be affected by this issue.

Calendar Invites from a Custom Sending Domain

If a host sends email from a custom domain (an Enterprise feature) and Gmail isn’t showing the Yes/No/Maybe buttons — the invite arrives only as an .ics file attachment — the host’s domain is most likely missing a DMARC record.

Gmail won’t render the interactive invite unless the sending domain passes email authentication. Luma signs every custom-domain email with aligned DKIM, but Gmail also expects a DMARC record published on the domain. Without one, Gmail treats the invite as untrusted and hides the RSVP buttons. Standard Luma sender addresses (@luma-mail.com) already have this set up, which is why those invites work normally.

If you’re the host, first check whether your domain already has a DMARC record — a TXT record at _dmarc.yourdomain.com.

If you don’t have one, add this:

_dmarc.yourdomain.com → TXT → v=DMARC1; p=none;

That minimal policy is enough for Gmail to trust the invite. A stricter v=DMARC1; p=quarantine; rua=mailto:[email protected]; is recommended for better deliverability and reporting. DNS changes can take a few hours to propagate; the fix applies to invites sent after that.

If you already have a DMARC record, leave it as is — you don’t need to add or change anything. Luma signs your mail with DKIM aligned to your domain, so it passes DMARC under your existing record automatically, whatever your policy (p=none, p=quarantine, or p=reject). Don’t add a second _dmarc record: a domain with two DMARC records is treated as having none, which would break invites for everyone.

If you’re a guest, you can still add the event by tapping the attached .ics file directly.

Other Guests Appearing as Attendees on My Calendar Invite

If you see other guests listed as attendees on your Google Calendar event, this is a Google Workspace behavior — not a Luma issue. Google Calendar automatically links copies of the same event for people in the same organization or who share calendars with each other.

Luma sends each guest their own individual calendar invite. However, if other guests are in your Google Workspace organization or you share calendars with them, Google Calendar will show them on your copy of the event. Only you and others in your organization will see this — guests outside your organization will not see those attendees on their invite.