I understand that if I type a name or word, especially an unusual one, in ATT/Yahoo email, that the spellchecker will underline it. I then tell it to ignore all instances but spellcheck continues to underline (flag) every instance of that word within the same email. In the past, I know that I could choose to 'ignore' or to 'add'. But I might be thinking of a different email system. However, I have been using ATT/Yahoo for quite a long time and it seems like the feature that I want has just disappeared. I should emphasize that I am NOT referring to the annoying spell checker in Y! Answers which seems to think that every word I type is wrong.

Does anyone remember that there once was a feature that allowed adding words or even ignoring all instances?

More importantly, does anyone know how to add words to the spellchecker in email or to force it to ignore all instances of a perceived misspelling ?