Really Simple SSL pro Features
- Extensive scan which enables you to detect the source of mixed content that couldn’t be fixed automatically, with fix button
- Premium email support
- HttpOnly and secure flags to make the cookies more secure
- Improve security by enabling HTTP Strict Transport Security for your site
- Submit your site to the HSTS preload list
- Warning by email and in your SSL dashboard when your certificate is about to expire
- Mixed content fixer for the back-end
Note: You have to install and activate its free version in prior to using this plugn. Download it on WordPress.org here.