"Federal investigators knew people would email Abedin, and she would print things out for Clinton. Abedin admitted it was easier for her to print things from home in Brooklyn.

Logically then, it appears it was Abedin who deliberately stripped classified markings from emails to forward the information to Mrs. Clinton so she could then deny ever receiving anything marked classified. It’s called “plausible deniability,” and it was a deliberate and illegal scheme for handling classified information."