[net.mail] No valid "From" line? Foo. I don

tower@inmet.UUCP (05/21/85)

Re:
> /**** inmet:net.mail / down!honey /  8:27 am  May 19, 1985 ****/
> It happens (no To: line) because /bin/mail, the standard UNIX mailer, doesn't
> put in a To: line.  Next question.
> 
> 	Peter
> /* ---------- */

And this is why sendmail adds Apparently-To: lines.

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