Calendar invites: Sender is server instance, not user email address

Steps to reproduce

1. Create calendar entry and add attendees with email addresses
2. Submit/Save entry to calendar, invites are being sent to attendees (as expected BUT ...)
3. Emails are always sent with "from: nextcloud@internal.domain", not from "user@internal.domain"

Expected behaviour

Invites should be sent using the email address of the user (provided by user profile) creating the calendar entry. Using a central email makes responding, filtering, etc. impossible.
(internal domain is being converted when transmitted to the outside world, so no worries about that)

Actual behaviour

All invites are being sent with "from: nextcloud@internal.domain" which is the central notification email set via Administration -> Additional Settings -> Email -> Using SMTP

Server configuration

Operating system: FreeBSD 10.3

Web server: nginx-1.10.1_1,2

Database: mysql 5.6.33

PHP version: PHP5.6.27

Server version: (see your admin page) 10.0.1

Calendar version: (see the apps page) 1.4.1

Updated from an older installed version or fresh install: Update

Signing status (ownCloud/Nextcloud 9.0 and above): ?

Login as admin user into your cloud and access 
http://example.com/index.php/settings/integrity/failed 
paste the results here.

No errors have been found.

List of activated apps:

If you have access to your command line run e.g.:
sudo -u www-data php occ app:list
from within your instance's installation folder

root@nextcloud:/usr/local/www/nextcloud # su -m www -c "php occ app:list"
The process control (PCNTL) extensions are required in case you want to interrupt long running commands - see http://php.net/manual/en/book.pcntl.php
Enabled:

• activity: 2.3.2
• admin_audit: 1.0.0
• audioplayer: 1.3.1
• bookmarks: 0.9.0
• calendar: true
• comments: 1.0.0
• contacts: 1.5.2
• dav: 1.0.1
• direct_menu: 0.9.3
• documents: 0.13.1
• federatedfilesharing: 1.0.1
• federation: 1.0.1
• files: 1.5.2
• files_external: 1.0.2
• files_pdfviewer: 0.8.1
• files_sharing: 1.0.0
• files_texteditor: 2.1
• files_trashbin: 1.0.0
• files_versions: 1.3.0
• files_videoplayer: 0.9.8
• firstrunwizard: 1.1
• gallery: 15.0.0
• mail: 0.6.0
• news: 9.0.4
• notifications: 0.3.0
• password_policy: 1.0.0
• provisioning_api: 1.0.0
• serverinfo: 1.1.1
• survey_client: 0.1.5
• systemtags: 1.0.2
• templateeditor: 0.1
• theming: 1.0.1
• updatenotification: 1.0.1
• workflowengine: 1.0.1
  Disabled:
• encryption
• external
• files_accesscontrol
• files_automatedtagging
• files_retention
• ojsxc
• roundcube
• user_external
• user_ldap
• user_saml

The content of config/config.php:

root@nextcloud:/usr/local/www/nextcloud # cat config/config.php

<?php                                                            
$CONFIG = array (                                                
  'instanceid' => 'instanceid_here',                                
  'passwordsalt' => 'passwordsalt_here',            
  'secret' => 'secret_here',
  'trusted_domains' =>                                           
  array (                                                        
    0 => 'nextcloud.internal.domain,                             
  ),                                                             
  'datadirectory' => '/usr/local/www/nextcloud/data',                                
  'overwriteprotocol' => 'https',                                                    
  'overwrite.cli.url' => 'https://nextcloud..internal.domain',                         
  'dbtype' => 'mysql',                                                               
  'version' => '9.1.1.5',                                                            
  'dbname' => 'nextcloud',                                                           
  'dbhost' => 'db.internal.domain',                                                   
  'dbtableprefix' => 'oc_',                                                          
  'dbuser' => 'db_user_here',                                                           
  'dbpassword' => 'dbpassword_here',                                                    
  'logtimezone' => 'UTC',                                                            
  'installed' => true,                                                               
  'mail_smtpmode' => 'smtp',                                                         
  'mail_from_address' => 'nextcloud',                                                
  'mail_domain' => 'internal.domain',                                                 
  'mail_smtphost' => 'mail.internal.domain',                                          
  'mail_smtpport' => '25',                                                           
  'trashbin_retention_obligation' => 'auto, 30',                                     
  'versions_retention_obligation' => 'auto, 90',                                     
  'loglevel' => 2,                                                                   
  'maintenance' => false,                                                            
  'theme' => '',                                                                     
  'updater.secret' => 'updater_secret_hash',
  'appstoreenabled' => true,                                                         
  'appstoreurl' => 'https://apps.nextcloud.com/api/v0',                              
  'appstore.experimental.enabled' => false,                                          
  'apps_paths' =>                                                                    
  array (                                                                            
    0 =>                                                                             
    array (                                                                          
      'path' => '/usr/local/www/nextcloud/apps',                                     
      'url' => '/apps',                                                              
      'writable' => true,                                                            
    ),                                                                               
  ),                                                                                 
  'enabledPreviewProviders' =>                                                       
  array (                                                                            
    0 => 'OC\\Preview\\PNG',                                                         
    1 => 'OC\\Preview\\JPEG',                                                        
    2 => 'OC\\Preview\\GIF',                                                         
    3 => 'OC\\Preview\\BMP',                                                         
    4 => 'OC\\Preview\\XBitmap',                                                     
    5 => 'OC\\Preview\\MarkDown',                                                    
    6 => 'OC\\Preview\\MP3',                                                         
    7 => 'OC\\Preview\\TXT',                                                         
    8 => 'OC\\Preview\\Movie',                                                       
  ),                                                                                 
  'filelocking.enabled' => 'true',                                                   
  'memcache.locking' => '\\OC\\Memcache\\Redis',                                     
  'memcache.local' => '\\OC\\Memcache\\APCu',                                        
  'redis' =>                                                                         
  array (                                                                            
    'host' => '/var/run/redis/redis.sock',                                           
    'port' => 0,                                                                     
  ),                                                                                 
);  

Are you using external storage, if yes which one: local/smb/sftp/...
smb

Are you using encryption: yes/no
no

Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/...
no

Client configuration

Browser: Firefox/Chrome both current

Operating system: Linux/Windows/FreeBSD

CalDAV-clients: web-interface of nextcloud

[nickvergessen]

All invites are being sent with "from: nextcloud@internal.domain" which is the central notification email set via Administration -> Additional Settings -> Email -> Using SMTP

This is actually the expected thing, because not all SMTP connections are allowed to use a different sender address than their own.

However we set the "Reply-To" header, so you should be able to organize based on that.
Also replying/responding is not a problem at all. Works just fine.

Ok, I see. Have not looked at the Reply-To Field. Thanks for pointing that out.
/var/log/maillog just shows the From: field.

[tuergeist]

Re-Opening the issue. It would be great if you leave it to the admin to decide how it shall work. I actually use NextClound+Calendar for different domains; in that case it's somehow annoying to have to chose one special email address for everybody (also for users with different domain names).

[georgehrke]

#5304 will make it possible to opt-out of server-side scheduling.

[zyro23]

@georgehrke does it? #5304 looks like it fixes handling past events but not like it introduces a way to disable server-side invitation mail sending completely?

[georgehrke]

No, it's not included. I removed it upon request from Morris and Lukas. Will open a dedicated PR for it