test-email 

Sends an email message to the administrator address (configuration property mail.admin ).  This is useful for testing basic email sending as well as the templates for various specific email bodies.

With no arguments, dspace test-email sends a simple test message.

With arguments, the command composes a message using the template named in the first argument, with message parameters given by subsequent arguments:
    bin/dspace config/emails/test-email export_error "An error" https://dspace.myu.edu/feedback/