How can I prevent Norton adding [Norton AntiSpam] tag to Subject field of incomming messages?

I have just staerted using Norton again and notice that some incomming email messages have the tag "[Norton AntiSpam]" added to the beginning of the subject field.

I understand why Norton does this but I would prefer that it did not.

Is there any way to prevent this feature adding the tag [Norton AntiSpam]?

Many thanks for your help!