Inactive ex-worker applies to a job with his/her personal e-mail that is part of Core HR?

Summary:

What would be the system behavior if inactive ex-worker applies to a job with his/her personal e-mail that is recorded/stored in Core HR?

Content (please ensure you mask any confidential information):

Internal employees are using internal talent profile to apply to a job in ORC. In case that employee is separated, and, his/her assigment becomes inactive, and s/he uses his/her personal email address that is recorded in Core HR - what would be the system behavior? (will system going to take her/him to the internal site to apply? or will it ask to apply through the external career side? or something else).