I am using ALO Easymail Newsletter plugin and I haven't been able to successfully send a batch of emails for the past two weeks. The plugin is telling me that my wp-cron.php file is sending a 503 error. I have tried some troubleshooting things and am under the assumption that something is blocking the file.
Here is the detailed message: WP-Cron is not working properly: wp-cron.php is returning a 503: Service Unavailable response which could mean cron jobs aren't getting fired properly.
The file seems to be not accessible: is your blog behind some kind of authentication, maintenance plugin, .htpasswd protection?
Has anybody had this issue before and know of a fix? Thanks!