How do I configure SSL, mail server on my on-premise server?

Please go to the configuration file conf/ragic.properties on your on-premise server installation, this is where you'll find a way to do all types of configuration for your on-premise server.

For configuring SSL / HTTPS

# If SSL enabled, must create ./keystore file for java key
# Must provide password to enable
SSL_ENABLED=false
SSL_PASSWORD=
SSL_KEY_PASSWORD=
SSL_TRUST_PASSWORD=
SSL_KEYSTORE=./keystore
SSL_TRUSTSTORE=./keystore

For configuring mail:

# For sending out notifications, using a free Mandrill account as default
# Shared with other Ragic on-premise users, 12k emails per month
# If left blank, no notifications will be sent
SMTP_SERVER=
SMTP_SENDER_EMAIL=
SMTP_SENDER_PERSONAL=
SMTP_SENDER_AUTH_USER=
SMTP_SENDER_AUTH_PWD=
SMTP_PORT=587
SMTP_SSL_ENABLE=
SMTP_SSL_PORT=

There are also other optional configurations that you can try out. Remember that you will need to restart your Ragic service when you make edits to the configuration file.