if any message was marked as phishing or spam it’s not posible to change the subject back to the original.
To avoid this you should add the sender to the whitelist in antispam module.
Xxxxxxxx Xxxxxx
AVAST Software a.s.
I could have sworn that messages marked as *** Spam *** had there subjects returned to normal when I selected “Not Spam” on the Outlook 2010 add-in for AIS.