Internal applicants - default communication via private email?

Summary:

We are facing the issue that our client does not issue mobile phones, laptops etc. to most of their employees. Thus, they will have to access the opportunity marketplace from their private devices. This is fine, but then they won't have access to their work mail. This is the core issue.

Content (please ensure you mask any confidential information):

Thats why we want to know if we can default the internal candidate communication to the private email and not route it via the work email. Does a profile option or something else exist to achieve this requirement?

Version (include the version you are using, if applicable):