This will allow you to build subject statements in Inbound Rules that look for multiple criteria using boolean operators. This can either narrow or widen your criteria depending on how you piece your statement together.
This would allow you to search for multiple subjects or for subjects limited to one area such as cars and sales. In this example only those messages with both of the words in the subject line would be selected.
A narrow search would start with #IS# and is read as 'is equal to' as shown in the lower window of the expression builder.
