Preheat oven to 375 degrees F (190 degrees C).

In a bowl, stir together mayonnaise and mustard.

Stir in thyme, oregano, and basil.

Place salmon fillets on a baking sheet, and spread with the mayonnaise mixture.

Sprinkle with dill weed.

Bake in preheated oven for 30 to 40 minutes, until the salmon is easily flaked with a fork.