I've installed the plugin on two different sites. Since the test email didn't work on the first site, I built a sandbox to test it before sending out to the real group I need to add to a site. Sending to two different email addresses I own, I still receive no email, which should include username, password, etc.
The accounts that I add with the plugin (using CSV) are created and have generated passwords. It just appears that there is no email sent.