Activity via Email don´t work since upgrade to oc 10

Steps to reproduce

  1. enter e-mail settings via admin Panel using sendmail, test email is o.k. and comes into mailbox
  2. in activity set emails hourly and set checkboxes
  3. no email with acitvities arrives in mailbox

Expected behaviour

User should receive email with his activities

Actual behaviour

no email arrives

Server configuration

see part of config-report here:
"basic": {
"license key": "REMOVED SENSITIVE VALUE",
"date": "Wed, 19 Jul 2017 09:20:08 +0000",
"ownCloud version": "10.0.2.1",
"ownCloud version string": "10.0.2",
"ownCloud edition": "Community",
"server OS": "Linux",
"server OS version": "Linux cloud3.****.de 3.16.0-4-amd64 #1 SMP Debian 3.16.43-2+deb8u1 (2017-06-18) x86_64",
"server SAPI": "fpm-fcgi",
"webserver version": "Apache",
"hostname": "****.de",
"user count": 13,
"user directories": 13,
"logged-in user": "Admin"
},
"config": {
"instanceid": "och42otxgpi6",
"passwordsalt": "REMOVED SENSITIVE VALUE",
"secret": "REMOVED SENSITIVE VALUE",
"trusted_domains": [
"****.de"
],
"datadirectory": "\/var\/www\/vhosts\/****.de\/httpdocs\/data",
"overwrite.cli.url": "https:\/\/****.de",
"dbtype": "mysql",
"version": "10.0.2.1",
"dbname": "cloud",
"dbhost": "localhost:3306",
"dbtableprefix": "oc_",
"dbuser": "REMOVED SENSITIVE VALUE",
"dbpassword": "REMOVED SENSITIVE VALUE",
"logtimezone": "UTC",
"installed": true,
"mail_from_address": "no-reply",
"mail_smtpmode": "sendmail",
"mail_domain": "****.de",
"mail_smtpauth": 1,
"mail_smtphost": "ssl2.mails.mx",
"mail_smtpport": "587",
"mail_smtpname": "REMOVED SENSITIVE VALUE",
"mail_smtppassword": "REMOVED SENSITIVE VALUE",
"mail_smtpsecure": "ssl",
"loglevel": 1,
"maintenance": false,
"updater.secret": "REMOVED SENSITIVE VALUE",
"integrity_check_disabled": false,
"mail_smtpauthtype": "LOGIN"

It seems the problem was the cronjob what was not set properly. Works for now.