Re: 451 See http://pobox.com/~djb/docs/smtplf.html.

[D. J. Bernstein]

Aaron Nabil writes:
> The message in question had a "bare LF" in it, perfectly legal,

Bare LFs are now categorically prohibited by 822bis. They were never
handled correctly by sendmail. The client's behavior is inexcusable.

---Dan