Been married 5 years, my parents still address things to me under my maiden name. Say something or leave it?

They don't always do this, but a lot of the time they do. For the first year I didn't let it bother me because I figured I had gone by my maiden name so long that it was difficult to adjust, but now after 5 years it's starting to get rather irritating. I've brought it up before subtly by signing my last name on cards or e-mails. I've also come out and said something about it. It really aggravates my husband, as well, but I just can't get them to understand to make an effort to remember my married name, which is actually shorter and more common than my previous one. I'm certain that it's not just they can't remember it, I think they do this on purpose, which makes it more irritating. Also, I did not choose hyphenate either.