Account Registration Not Sending Activation Link

-- url of the page with the problem -- : clearwaterstesting.com/hikashop-menu-for...out/task-step/step-1
-- HikaShop version -- : 3.0.1
-- Joomla version -- : 3.6.5
-- PHP version -- : 5.6.29
-- Browser(s) name and version -- : Chrome 57.0.2987.133

Hello, I am currently testing my HikaShop Essential on my website and tried to do a registration to purchase a free test product. After finishing the registration form, the website forwarded me to a page with a large red box that said I had one step remaining in which I needed to click the activation link in my e-mail. It has been about 40 minutes now and still no activation link has sent to the e-mail I designated. Any idea what is going on? Here is the URL to my site, I have a product called "Test" that is free to troubleshoot HikaShop.

clearwaterstesting.com

I've attached an image showing the error message that the account is not activated, because I have not received the activation e-mail to do so.

Also I would like to add that the account activation link was not sent to my spam folder either in the e-mail I designated for the registration.

~Chris

So I tried this again with a different e-mail address and it seemed to work perfectly. The e-mail I initially used was the same that I have registered as a Super User in Joomla!, so I wonder if that had anything to do with it? It works now with one of my older random e-mail addresses.

Something to add, the first e-mail address I used was an academic e-mail address, the second one a Yahoo! e-mail. The server should send e-mail to all addresses correct?

~Chris