problems with reply addresses showing [email protected]

Try deactivating all other plugins and switching to the default theme.

I got it working properly on the development site which has the same theme, same version, same plugins etc. https://brokerco.metamode.com.au/ Might I add, this development site is also hosted on different server.

Checked again on the live site https://www.brokerco.com.au/ for consistency with the development site and still same problems. I don’t understand what could be causing this if the sites are practically same, just different servers?

So how do I fix on the live site? What could be causing this issue?

you can try adding this code in your themes functions.php file

/* changing default wordpress email settings
  with this function it changes the 'WordPress' name to your website name
  in the e-mails sent out from within WordPress  */

add_filter('wp_mail_from', 'new_mail_from');  

add_filter('wp_mail_from_name', 'new_mail_from_name');

function new_mail_from($old) {
 return '[email protected]';
}  

function new_mail_from_name($old) {
 return 'You Name Goes Here';
}

What’s the likely culprit though? Is this bug in plugin, theme or something on the host? I’d prefer not to have to make hardcoded changes that will get overwritten later on with updates.