So, I decided to look at the SMTP server that is used for their mail routing. I used NetCat to connect, and I tried to send mail from my hushmail.com account as the sender; when I specified Jason's e-mail address, the SMTP rejected me for the "spam reject" message.
But when I then tried to send mail with my other account (a Yahoo.com address) and with Jason's as the destionation, it went through OK.
For fun, here's the NetCat output:
==============
C:\Program Files\netcat>nc -v c10-mail.cnet.com 25
c10-mail.cnet.com [216.239.112.33] 25 (smtp) open
220 c10-mail2.cnet.com ESMTP Sendmail 8.12.10/8.12.10; Wed, 26 May 2004 22:00:49
-0700 (PDT)
help
214-2.0.0 This is sendmail version 8.12.10
214-2.0.0 Topics:
214-2.0.0 HELO EHLO MAIL RCPT DATA
214-2.0.0 RSET NOOP QUIT HELP VRFY
214-2.0.0 EXPN VERB ETRN DSN AUTH
214-2.0.0 STARTTLS
214-2.0.0 For more info use "HELP ".
214-2.0.0 To report bugs in the implementation send email to
214-2.0.0 sendmail-bugs@sendmail.org.
214-2.0.0 For local information send email to Postmaster at your site.
214 2.0.0 End of HELP info
helo c10-mail.cnet.com
250 c10-mail2.cnet.com Hello ME [xxx.xxx.xxx.xxx],
pleased to meet you
mail from: ME@hushmail.com
250 2.1.0 ME@hushmail.com... Sender ok
rcpt to: Jason.Hiner@techrepublic.com
552 5.0.0 Spam rejected...In case of error please contact postmaster@cnet.com
^C
C:\Program Files\netcat>nc -v c10-mail.cnet.com 25
c10-mail.cnet.com [216.239.112.33] 25 (smtp) open
220 c10-mail1.cnet.com ESMTP Sendmail 8.12.10/8.12.10; Wed, 26 May 2004 22:01:58
-0700 (PDT)
help
214-2.0.0 This is sendmail version 8.12.10
214-2.0.0 Topics:
214-2.0.0 HELO EHLO MAIL RCPT DATA
214-2.0.0 RSET NOOP QUIT HELP VRFY
214-2.0.0 EXPN VERB ETRN DSN AUTH
214-2.0.0 STARTTLS
214-2.0.0 For more info use "HELP ".
214-2.0.0 To report bugs in the implementation send email to
214-2.0.0 sendmail-bugs@sendmail.org.
214-2.0.0 For local information send email to Postmaster at your site.
214 2.0.0 End of HELP info
helo c10-mail.cnet.com
250 c10-mail1.cnet.com Hello ME [xxx.xxx.xxx.xxx],
pleased to meet you
mail from: ME@yahoo.com
250 2.1.0 ME@yahoo.com... Sender ok
rcpt to: Jason.Hiner@techrepublic.com
250 2.1.5 Jason.Hiner@techrepublic.com... Recipient ok
^C
=========
Spam rejected!
Well!!!!