A reader once wrote to E.B. White:

Dear Mr. White,

I’m omitting needless words!

Sincerely yours,

[a reader]

He wrote back:

Dear Ms. ——

Thanks. So am I.

Yrs,

E.B. White

(From Mark Garvey, Stylized: A Slightly Obsessive History of Strunk & White’s The Elements of Style, 2009.)