Add Not condition in a mail rule using Outlook 2007
How do I add a NOT
condition in a mail rule?
You cannot add a NOT
condition directly. However, you can use Exceptions to achieve the same effect:
There are three (main) steps to the rule creation process:
Conditions to check:
This is where you are trying to add your negation rule. You can't.
Action to perform:
Example move to a folder.
Exceptions to apply:
This is where you can choose your word in the subject
You have to use the advanced wizard to create rules this way.
So in your case (imagining you wanted to move everything to a folder called 'Moved' when the subject does not contain the word 'unmovable'), you'd do this:
Don't select anything (apply to ALL messages).
Select 'move it to the specified folder'. Then select the 'Moved' folder.
Select 'except if the subject contains specific word'. Then type 'unmovable'.
Source Outlook Rule - Not in Subject
Further Reading
Creating rules with NOT conditions
How to Use Exception Conditions in Outlook to Create Negative Emails Rules