Joseph Brennan wrote:
Oh, replying to myself...
I just tested sending from a Gmail account to my regular columbia.edu
<http://columbia.edu> address, using BCC and with no address in "To:".
This did not hit MISSING_HEADERS, and in fact had /To:
undisclosed-recipients:;/. So now I don't know what the sender did in
the case I was writing about.
Based on odd but legitimate things I've seen, likely using their GMail
address with some other outbound relay, and/or some webform-ish thing or
bulk-mail widget or service that barely manages to send minimally
RFC-compliant email at all - never mind following most best practices.
There are altogether too many of the latter around. :(
-kgd
