WHMCS invoice

WHMCS is a very powerful financial management system. Since I used WHMCS to connect SolusVM when building its cloud host, I found that I encountered many problems when using WHMCS. The first problem is that WHMCS switches to SMTP for sending letters. By default, you can use PHP of WHMCS to send letters, but most of the letters sent are thrown into the trash by major mail providers.

Recently, because I launched WHMCS, I suddenly discovered that WHMCS basically realizes most of the online sales tasks of small webmasters. I originally thought of using the WordPress online sales plug-in "Easy Digital Downloads" to create a WP-based virtual item sales platform, but I found that if It's actually easier to use WHMCS.