xBilling is not a core module, therefore it is not supported by premium support. Premium support is only for helping with the default install of Sentora. Any add-on, customization, or third-party module is supported by their respective creators or community members that use the them.
The email issue with xBilling seems to be common. modpluz has been trying to sort it out, but he has yet to reproduce it in his testing. It's hard for a module developer to test on multiple operating systems
The email issue with xBilling seems to be common. modpluz has been trying to sort it out, but he has yet to reproduce it in his testing. It's hard for a module developer to test on multiple operating systems