I had been using the wget cron since the initial installation without any problems until sometime after June 7th 2015. This was the last day that emails went out from the site. I checked the cron, and tried adjusting it, but kept getting a JSON parse error. The wget had to eventually be deleted, and replaced with a direct route to the cron /usr/local/bin/php /home/username/public_html/sub-domain/oxwall/ow_cron/run.php, and SMTP had to be deactivated to get the emails going out again. I also tried the curl line. It set up okay, and I was able to edit it, but it didn't work either, so I stayed with the direct route to the cron that Arvixe set up for me. I just don't know why the SMTP, and wget stopped working. I am running version 1.7.4, and did the update on 6/3/15, so I don't think that was the reason since emils went out on 6/7. Maybe someone has some insight on this.