Run "subscription-send" to enable
NOTE: Until you enable the "subscription-send" script, users will not receive the email updates for their subscriptions. It is HIGHLY RECOMMENDED to enable this script via Scheduled Tasks via Cron. See sample settings on that page.
To send out the subscription emails you MUST invoke the subscription-send script from the DSpace command-line or Processes UI. It is advised to setup this script as a Scheduled Tasks via Cron. See sample settings on that page.
This script requires the "-f" (--frequency) parameter with a value of "D" (Daily), "W" (Weekly), or "M" (Monthly). Keep in mind, you will want to schedule it to run on a Daily, Weekly and Monthly basis to send the appropriate emails."