I'm not sure this question belongs here or on the Flying Blue forum.

I book our KL tickets on nwa.com (far better fares/lower taxes). N-class gives only 25% miles, but sometimes the site suggests booking class E - giving 100% if I understand this correctly. And E is just a bit more expensive than N.

However, when searching for flights/fares, E is not amongst the booking classes one can specify. Could anyone explain this to me please?

Thanks!