I am not talking about sorting order, what I mean is the columns themselves in the Message List.

E.g. in my mailbox I want the following columns in the following order from left to right: Subject-From-Date-Size. But in feeds (I get them with RSSyl) I want the columns either in another order (Subject-Date-From-Size) or to not have the From column at all (Subject-Date-Size).

Rationale: the date and time of a news item is usually more important than the author name. Besides, many sites give feeds without the names of authors of news items, so From just displays the name of the site, so this field is not needed, because this site's feed is already in a separate folder. The same goes for blogs with just one author.