Php Mailer is disabled due to the use of Php Mailer to Spam. We need to the keep Server IPs clean so no has issues sending emails. 

Please use SMTP for your emails. If using WordPress you can follow this guide to setup SMTP: 

https://www.wpbeginner.com/wp-tutorials/how-to-use-smtp-server-to-send-wordpress-emails/

Create an email account in cPanel and use the details in your email script or software.

SMTP host : localhost or use mail.mydomain.com
SMTP user name : email Id created on server
SMTP password : password of the email ID.

It is easy to change your cPanel password in your client account.

Login to your client account, then go down the Dashboard page, you will see Package List.

Click the link for your package.

To force all of the web traffic (every link in your website) to use HTTPS insert the following lines of code in the .htaccess file:

RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

First of all, if your distance to the server is significant this could have an effect on the latency of the page, but if this is not the case you can try these options out.

You can enable 'opcache' under the 'Select PHP Version' in cPanel, this could help with any issues.

Also, WordPress offers W3 Total Cache, https://wordpress.org/plugins/w3-total-cache/ . You can give these a go and see how it works out.

These should increase your WordPress speed if you are facing any speed issues.

You are allowed to send 100 Emails per Hour.