STEP 1 : An automatic newsletter is sent including a content named "mycontent" which is in page named "mypage"
STEP 2 : I rename "mypage" -> "mypage2" and i choose to change URL and create Alias
STEP 3 : When i clic on "mycontent" from the newsletter, i get 404 error

If i look into created alias, it doesn't take into account the URL to get a content which is in a newsletter