Hi,

After upgrading joomla and some extensions we have problem with too many notifications.
In com_content configuration notifications are enabled. Two usergroups are selected as moderators groups and they are receiving email about new comments. Also users who want to be notified recieve notifications. Problem is with new registered users. They receive many unwanted spam messages.
There was a problem with our custom components and new users didn't have any usergroup assigned. I thought this was a problem but now this is fixed and new users are in group Registered but they still are receiving spam.

com_comments versions is 4.2, due to many custom modification we can't move to 4.2.1 quickly
joomla 2.5.6 (on joomla 2.5.4 everything was ok)
community builder 1.8.1 (used to be 1.8 )

Any ideas what is wrong and how to fix this issue?

I checked one new user who receives spam from us. He hasn't posted any single comment. He is in Registered group.