Receiving error: The configuration for the email transport subsystem has shown to be missing or invalid. Please check the related section of your Graylog server configuration file. This is the detailed error message: Email transport is not enabled in server configuration file!
Trying to access the configuration file, however I am having a hard time and when I try to access the file with the command nano /etc/graylog2.conf there is no file to modify.
Is your SMTP server listening on the given address (the <smtp server> part in the set-email-config command) on port 587 (the <smtp port> part in the set-email-config command)?