[kimtieuphuong]

How can I create a forward rule that will forward all messages to an email address except messages from a specific sender?

I know how to create advanced rules that when something is in a header, such as this:
allof(header :contains "from" "xxx.com", header :contains "to" "yyy@abc.com")

But I'm not sure of the syntax to exclude something.

Thanks for any help.