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Calendar Invitation Not Recognized When Attendee Name Contains Capital Letters #11914

@The-1ST

Description

@The-1ST

Steps to reproduce

When I receive meeting invitation emails from outside (specially exchange), if my attendee name in the invitation includes capital letters or is fully capitalized, the Mail app fails to recognize me as a participant. Instead of showing the "Accept" button, I get the following message:

This message has an attached invitation but the invitation does not contain a participant that matches any configured mail account address

To Reproduce
Steps to reproduce the behavior:

1- Use an external calendar (like exchange) to send an invitation to my Nextcloud Mail address.
2- In the attendee list, write my name or email using capital letters (e.g. [email protected] or My Name [email protected]).
3- Open the invitation email in the Nextcloud Mail app.
4- Notice that the app does not offer any "Accept/Decline" buttons and shows the error message above.
"This message has an attached invitation but the invitation does not contain a participant that matches any configured mail account address "

Expected behavior

I expect the app to recognize my email address regardless of case (capitalization) and allow me to respond to the invitation.

Actual behavior

shows this message instead
"This message has an attached invitation but the invitation does not contain a participant that matches any configured mail account address "

Image

Mail app version

5.5.7

Nextcloud version

31.0.9

Mailserver or service

dovecot

Operating system

ubuntu 24

PHP engine version

None

Nextcloud memory caching

No response

Web server

None

Database

None

Additional info

No response

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