6. Email Notification Settings


The “Email Notification Settings” chapter contains information you might need only if you are using Cerebro on your local server (see “Local (On-premises) Deployment”).

Cerebro uses email to send different notifications to users and to send/receive Forum messages to/from the so called “email users”, i.e., Cerebro users who don’t have access to desktop Cerebro client.

In case of local Cerebro installation you’ll have to configure a local mailing server as well. Since Cargador serves both as a storage server and mailing server, it’s common to configure it to work on the same machine (see “Cargador Service Installation”). This will simplify deployment procedures, although if you wish, you may set up a different server with Cargador to serve mailing purpose only.

6.1. Using Cargador

If you followed all the instructions contained in “Cargador Service Installation” chapter while deploying Cargador, then all needed files for emailing functions are already created in Cargador directory.

You have to create a dedicated email account on behalf of which Cerebro will send the messages, and to set several parameters in the cron_conf.py script.


The script requires Python (http://www.python.org) version 3.х or higher. Make sure that the Python directory has been added to the system path. You can check it (as well as resolve the Python version) by executing the following command in the console:

python3 --version

6.2. Setting Parameters

If you use one Cargador instance for both file management and emailing, then the DB_HOST, DB_PORT, DB_SCHEMA, CARGADOR_HOST, CARGADOR_RPC_PORT parameters in the cron_conf.py script must have been already set while configuring the file storage. Otherwise, follow the “Deleting Files From Storage” chapter to configure them.

The script parameters for receiving/sending procedures are described below:


MAIL_FROM  = "Cerebro <noreply@cerebrohq.com>"

#debug options
DEBUG = False;              # May used for debug

EXTERNAL_DB_ADDR = 'cerebrohq.com:45432'

OPTS = {
    'db_connection_addr' : EXTERNAL_DB_ADDR

    , 'smtp_port' : 25    # defaults 25 for simple and 465 for SSL. Use 587 for Exchange
    , 'smtp_tls' : False  # Needed for Google SMTP

    # replier options: DO NOT forget enable 'Allow reply..' in Adminstartion/Universe window
    , 'replier_from_addr' : 'Cerebro reply <reply@your-domain.com>'
    , 'replier_pop_addr'  : ''
    , 'replier_pop_ssl'   : True
    , 'replier_pop_login' : ''
    , 'replier_pop_psswd' : ''
    # do not change 'replier_downloader_url' unless you sure
    , 'replier_downloader_url' : 'https://cerebrohq.com/download.php?db_host=' + EXTERNAL_DB_ADDR.partition(':')[0] + '&db_port=' + EXTERNAL_DB_ADDR.partition(':')[2] + '&'
    , 'replier_separator' : ''

Parameter Values:

  • CARGADOR_HTPP_PORT – network port (default 4080), used to connect to Cargador on HTTP protocol (e.g., on attempt to download a file linked to an email notification);
  • MAIL_FROM – an email account (default - “Cerebro <noreply@cerebrohq.com>”), on behalf of which Cerebro sends email notifications;
  • MAIL_SMTP – IP address or DNS name of the SMTP server used to send messages;
  • MAIL_ADMIN – System Administrator’s e-mail address (used for service messages);
  • MAIL_USE_SSL – “Use SSL on authorization” attribute (default - False);
  • MAIL_LOGIN – account name for authorization on the mail server;
  • MAIL_PSSWD – password for authorization on the mail server;
  • DEBUG – “Display debugging info” attribute (default - False);
  • EXTERNAL_DB_ADDR – Cerebro database address for external access, format - <host>:<port> (default - ‘cerebrohq.com:45432’).


You may use either your corporate email server or Internet email services for mailing purposes, but take into consideration that free email services might have some “anti-spam” restrictions, which may affect the amount/frequency of the messages sent by Cerebro.

The OPTS section contains a list of additional parameters which control the way server modules work. Parameter groups are described below.

The db_connection_addr parameter contains the database connection address (by default it is equal to EXTERNAL_DB_ADDR).

The other two parameters are used for “fine tuning” of the mailing server:

  • smtp_port – network port (default - 25) for server connection;
  • smtp_tls – “Use TLS” attribute (default - False).

Another group of settings is responsible for configuring handling of incoming messages:

  • replier_from_addr – “Reply To” address for the incoming messages;
  • replier_pop_addr – address of the POP server for the incoming messages;
  • replier_pop_ssl – “Use SSL to connect to POP server” attribute (default - True);
  • replier_pop_login – username to connect to the POP server;
  • replier_pop_psswd – password to connect to the POP server;
  • replier_downloader_url – is a prefix that forms the beginning of download links in Cerebro email notifications.


The settings of incoming email handling described above take effect only after Allow to respond from E-mail attribute is enabled in the Administrator panel (see chapter: “Cerebro Administrator Panel”).