How to find invitations in IMAP mailboxes / email accounts

Hi,

I want to find all invitations that I received to my IMAP mailbox / email account.
But the “Invitations” view in the right sidebar seems to only work for email accounts with an included calendar like Microsoft Exchange.
It does not show the invitations that I received to my IMAP mailbox / email account.

I tried creating a search folder searching for attachments named *.ics which works partly but it looks like not every invitation has such an attachment.
Probably depending on the program it was sent from.

So how can I search for really all invitations?

Thanks.

Best regards,
Alex

Just wondering. All emails subject lines related to calendar invitations in my case either start with “Invitation:”, “Accepted”, or “Declined” (or the equivalent in French because I use both languages for invitations).

Thanks for the input.
This helps me finding more but still not all invitations with my search folder.

A lot of them have no prefix in the subject that I could use for finding them.
For example all of the ones I found before by searching for a *.ics attachment.

Probably highly dependent on the email client used for sending the invitations…

Does anyone know how to reliable find all invitations / calendar elements?

Is there really no way to do so?

The first thing to consider is that the Invitations side-bar is showing items in calendars, not messages.

So, if you have received an invitation on an email account that has no associated calendar, there will be no calendar event to include in the side-bar.