That wasn't the problem. AFAIK, OE is rightly mis-parsing incorrectly formatted quoted-printable soft line-breaks in message bodies. From a technical viewpoint, I don't like it's failure mode, but from UI POV, it's actually quite good.

No, the concern I had was whether \\n in SMTP instead of \\r\\n (as per the standard) is at all widespread or is it just an aberration in the setup I'm working with?

Wade.