[RainLoop](https://www.rainloop.net/) is a simple, modern and fast web-based email client. RainLoop source code is hosted on [GitHub](https://github.com/RainLoop/rainloop-webmail). This guide will show you how to install RainLoop on a fresh CentOS 7 Vultr instance. - Nginx - PHP version 5.4 and above, as well as the following extensions: - `cURL` - `iconv` - `json` - `libxml` - `dom` - `openssl` - `DateTime` - `PCRE` - `SPL` - Optional PHP extension: `PDO` (MySQL/PostgreS......