Multiple Email Address

The validation function will only support 1 email address. What are you trying to do exactly?

I see. Is there anyway to show multiple email address on the code?

Was planning to show multiple email address when they press on the Apply button.

You could possible add a second field/custom field for the additional email addresses and then output them inside the job-application template.

https://wpjobmanager.com/document/template-overrides/
https://wpjobmanager.com/document/customising-job-application-process/

As long as the job has a ‘main’ email address its fine.