How do i remove mail that wont delete?
 

I cannot delete an e-mail from a reliable source from my dads pc, a prompt
about an array index comes up. The preview pane says that the mail cannot be
seen as the credentials need to be verified.

This happened as follows:
My dad sent me a task named AB
I sent a report on the task and renamed it as AB: C
The Mail with subject AB: C cannot be deleted from my dads pc.

Please help with this BUG??
Thanks