Please help us by providing the following info. Before posting please also check the pinned "Known issues" threads and make sure that you're running the latest available version for your oC release: https://owncloud.org/changelog/
Steps to reproduce
1. Server sending a notification email notification activity every 15 minute whtin the same content.
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Expected behaviour
Tell us what should happen
Actual behaviour
Tell us what happens instead
Server configuration
Operating system: Centos 7
Web server:Apache
Database: Mysql
PHP version: 5.4
ownCloud version (see ownCloud admin page): 9.1.0
Updated from an older ownCloud or fresh install:
Special configuration (external storage, external authentication, reverse proxy, server-side-encryption):
ownCloud log (data/owncloud.log)
Please paste possible errors in the following code block, see https://central.owncloud.org/t/how-to-find-webserver-or-oc-logfile-enable-php-logfile/808 for more info
Integrity status for oC9+
Login as admin user into your ownCloud and access
http://example.com/index.php/settings/integrity/failed
paste the results here.