I have spent the whole morning researching email spam blocking of email sent from this site's smtp server. Yahoo and hotmail will consider email from heymow as spam, so you have to make sure they do not automatically delete spam, and you will have to check your junk email folder for the activation email. I suggest that you highlight the email and "un-junk it" or mark it as "not spam".
The email server does work. I have successfully sent emails using 2 different methods from and to firstname.lastname@example.org
to 5 different servers. So if you are not getting email, it is either your server's spamblocker settings or you have input an incorrect email address.