Apply not working

Thanks for your post, sorry for late reply.

can you please tell me you are using application manager addon (premium) otherwise
In basic method for apply via email will only open a pop up which will user send email manually

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If you use application manager addon it will send through your website and add record for each application , please check it out following link.
http://www.pickplugins.com/item/job-board-manager-application-manager/

Let me know if you need more help.

Regards