Emails are not sent when adding a recipient after an appointment has been created

[razerrazer]

Steps to reproduce

1. Create a calendar.
2. Add some attendees.
3. Save the meeting.
4. Click on the meeting, and now add a new attendee. When you do this, no email is sent to the newly added user.

Expected behavior

No email is sent to the attendee who is added after the calendar has been created in the first stage.

Actual behavior

It should send an email to the attendees you add to the event after it has been created.

Calendar app version

5.0.6

CalDAV-clients used

none

Browser

Chrome latest and Firefox latest

Client operating system

Linux mint

Server operating system

Debian

Web server

Nginx

Database engine version

MariaDB

PHP engine version

PHP 8.2

Nextcloud version

30.0.2

Updated from an older installed version or fresh install

Fresh install

List of activated apps

Nextcloud configuration

This is not important

Web server error log

nothing in here.

Log file

Browser log

Additional info

No response

[SebastianKrupinski]

Hi @razerrazer

I have some basic question to ask first...

1. Do you have a system email account setup?
2. Do you have a mail account setup with the same email address as the calendar organizer?
3. Is there any errors in the nextcloud.log?

[schmaller]

Btw. the description should not be "... after a calendar has been created..." but "... after an appointment has ...".

Same issue here with with nextcloud 30.0.2 and calendar 5.0.6.
General email settings in nextcloud are tested and working.
Even more strange: when removing an attendee, a cancellation email is sent, but when adding an attendee by email, nothing happens.
There are no errors in any logs.

[SebastianKrupinski]

Tested. Unconfirmed.

I was not able to reproduce your issue.

• Created an event with one attendee
• Added second attendee

I do see two outbound messages and added users mailbox does have an invitation.

[razerrazer]

If you try using multiple email addresses, it sometimes just doesn’t work. I also know that the email server is functioning properly, and the logs aren’t giving me any clues.

I’ll test this further during the day and see what comes up.

[schmaller]

For my case, I could track down the problem to the commit nextcloud/server@43ee948 (upgrade to 30.0.0 beta).

Since this commit the CUTYPE=UNKNOWN is categorized as "Room or Resource" and thus no email is sent.
The commit was addressing the issues #3919 and nextcloud/server#38686, but the change of this specific line in code was IMHO off-topic and is now a bug.

@razerrazer , can you check the CUTYPE in your .ics calendar entries?

[SebastianKrupinski]

@schmaller Thank you.

@razerrazer can you confirm the findings? Is it the CUTYPE issue?

[razerrazer]

If i look in to my event.ics so is the CUTYPE=INDIVIDUAL

[flipb1ts]

I have this same issue where CUTYPE=UNKNOWN, coming from a calendar entry synced using CalDAV - when the calendar entry is written with CUTYPE=UNKNOWN, the email notifications do not fire because of the categorization of "Room or Resource", and no email is sent.

[MrRinkana]

@SebastianKrupinski I can recreate this issue with events created outside the web interface (outside of the nextcloud calendar app), as in for example created in a calendar app on my phone and then synced to nextcloud calendar with calDav (such as DAVx⁵):

Steps to reproduce and results:

1. Create an event in an external calendar app, for example etar (that is syncronised with the nc calendar with caldav, trough for example DAVx⁵) and add invitees
2. Observe no emails being sent (even after making sure the event is visible in nextcloud calendar, including invitees "waiting for reply")
3. Try to add more invitees trough the web interface (in nextcloud calendar directly)
4. Observe no emails being sent

Basically calendar events created externally do not send emails for any action (adding invitees, editing event, removing event) even when afterwards done directly in nextcloud calendar.

If the event is created from start in nextcloud calendar, my instance does indeed send emails:

1. Recreate the event fully (not edit) trough the web interface
2. observe emails being sent.I'm not sure how it is supposed to work with external calendar apps,