Sorry for the late reply on this, I've been out of the office for the past two weeks, and am just now getting through all of my email.
Regarding the issue you reported, you are correct, this is a bug, thanks for pointing it out. I've logged a bug report here:
https://jira.duraspace.org/browse/DURACLOUD-763. You'll note that I went ahead and fixed the issue in the DuraCloud codebase. The problem, as you pointed out, was that the regex was not set up properly to allow for subdomains in the domain section of the email address (so
us...@utexas.edu was accepted, but not
us...@austin.utexas.edu). So, yes, those two init properties are intended to be email addresses. Until we release a new version, you'll likely need to continue to use an alternative address, like the gmail address you used for testing.
Thanks again for the bug report.