then when you send a verification check the ow_base_mail table to see if the email is there, the emails are in that table only a short time because once they are sent then that table is clear. 

So if you see the email in that table and then it is gone, then it was sent and it is up to your email server after that and then the email client after that. So once it leaves that table it has left oxwall.

Also check the junk mail for those emails to see if they are going to junk mail instead.

so what you do is you set up a cron that executes one time per min just use the cron form and it will show you, you want to do 1x per min every day every week every hour every min 

and then if your oxwal is in the public html then and this is the command 

just replace username with your cpanel username

php -q  /home/username/public_html/ow_cron/run.php

does yours look like this 

http://stackoverflow.com/questions/12930936/wget-curl-and-php-for-cronjobs

read the checkmarked answer ;)  hope that helps 

and then that url on there is that your site url?

but i have never seen a cpanel like that before, its either a custom job or an old version or its very limited in the server setup, you may have to ask your host what to put in there.