Employer can response by e-mail on applications matched with their vacancies.
The response is stored in the database and linked to the applicantion and the vacancy.

Jobseekers/Applicants can response by e-mail on vacancies matches with their applications.
As well the response can be done by manual vacancy searches by the jobseeker/applicant.
The e-mail response will be stored in the database and linked to the vacancy and in case of an application (none manual) to the application.