The judge also blamed Carly's state of mind on Royal Mail's inadequate response to her complaint about Stewart.
The ex-Olympic boxing hopeful called Royal Mail on March 11, 2022, in a "distressed" state and blamed her torment on the company's failure to deal with Stewart's offending.
She said she complained to Royal Mail when he sexually assaulted her but, after initially being moved, he was soon put back on her round.
The woman said she complained to Royal Mail but they failed to inform police and just "swept it under a rock".
A Royal Mail spokesperson said: "These crimes were abhorrent and had significant, and in cases tragic, consequences for the victims.