Steps to reproduce the issue

Have an active joomla 3.5.1 site which you use several times a day.

Expected result

Receive no more then one update e-mail

Actual result

Got five e-mails to update joomla in 3 days

System information (as much as possible)

Setting Value

PHP Built On Linux vps-46540-826........hostnet.nl 2.6.32-042stab116.2 #1 SMP Fri Jun 24 15:33:57 MSK 2016 x86_64
Database Version 5.5.49-0ubuntu0.12.04.1
Database Collation utf8_general_ci
Database Connection Collation utf8mb4_general_ci
PHP Version 5.3.10-1ubuntu3.22
Web Server Apache
WebServer to PHP Interface cgi-fcgi
Joomla! Version Joomla! 3.5.1 Stable [ Unicorn ] 05-April-2016 22:45 GMT
Joomla! Platform Version Joomla Platform 13.1.0 Stable [ Curiosity ] 24-Apr-2013 00:00 GMT
User Agent Mozilla/5.0 (Windows NT 10.0; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0

Relevant PHP Settings
Setting Value

Safe Mode Off
Open basedir /:/tmp/
Display Errors Off
Short Open Tags On
File Uploads On
Magic Quotes Off
Register Globals Off
Output Buffering On
Session Save Path /var/lib/php5
Session Auto Start 0
XML Enabled Yes
Zlib Enabled Yes
Native ZIP Enabled Yes
Disabled Functions pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,
Multibyte String (mbstring) Enabled Yes
Iconv Available Yes
Maximum Input Variables 1000

Configuration File
Setting Value

offline 0
offline_message This site is down for maintenance.
Please check back again soon.
display_offline_message 1
offline_image
sitename Loft in Leiden - Nieuwbouw Woningen
editor jce
captcha 0
list_limit 20
access 1
debug 0
debug_lang 0
dbtype mysqli
host xxxxxx
user xxxxxx
password xxxxxx
db loft
dbprefix w5a74_
live_site
secret xxxxxxxxxxxxxxx
gzip 0
error_reporting default
helpurl https://help.joomla.org/proxy/index.php?option=com_help&keyref=Help{major}{minor}:{keyref}
ftp_host
ftp_port
ftp_user xxxxxx
ftp_pass xxxxxx
ftp_root
ftp_enable 0
offset UTC
mailonline 1
mailer mail
mailfrom xxxxxxx@xxxxxxxxxx.nl
fromname Loftinleiden
sendmail /usr/sbin/sendmail
smtpauth 0
smtpuser xxxxxx
smtppass xxxxxx
smtphost localhost
smtpsecure none
smtpport 25
caching 0
cache_handler file
cachetime 15
cache_platformprefix 0
MetaDesc In 50kV zijn 30 loftwoningen beschikbaar, iedere woning bestaat uit meerdere verdiepingen. Twee woningen hebben een inpandig balkon. De overige woningen hebben de beschikking over een eigen dakterras met uitzicht over Leiden.
MetaKeys loft,leiden,woning,verkoop,nieuwbouw,lofts,woningen,leyden,nieuw leyden,50kv,loft in leiden,schakelstation, transformatorstation
MetaTitle 1
MetaAuthor 1
MetaVersion 0
robots
sef 1
sef_rewrite 1
sef_suffix 0
unicodeslugs 0
feed_limit 10
feed_email none
log_path xxxxxxxxxxxxxxx/httpdocs/logs
tmp_path xxxxxxxxxxxxxxxl/httpdocs/tmp
lifetime 15
session_handler database
memcache_persist 1
memcache_compress 0
memcache_server_host localhost
memcache_server_port 11211
memcached_persist 1
memcached_compress 0
memcached_server_host localhost
memcached_server_port 11211
redis_persist 1
redis_server_host localhost
redis_server_port 6379
redis_server_auth
redis_server_db 0
proxy_enable 0
proxy_host
proxy_port
proxy_user
proxy_pass
massmailoff 0
MetaRights
sitename_pagetitles 2
force_ssl 0
session_memcache_server_host localhost
session_memcache_server_port 11211
session_memcached_server_host localhost
session_memcached_server_port 11211
frontediting 0
cookie_domain
cookie_path
asset_id 1

Additional comments

Hey guys, I like that we get update mails now for new versions, but a little less of them would be nice. Also, as we have to update 60+ site we and others might consider waiting for the first bug fix release before starting to do this for all this sites.
There have been several sites where we got more then one mail, it seems as if this is dependent on how often you log-in to the backend? It might me nice to register in the database somewhere if the mail has already been send.

Thanks!