comment_email hook doesn’t seem to work for comment editor field

You have to filter 'get_comment'. The filter is part of the function with the same name. It is called in wp-admin/comment.php?action=editcomment and the comment is passed to the edit form where you see the email.

The parameter is a comment object, you can change the email value here.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)