strange e-mail from root

[Joshua Andrews]

Sorry, I know this is not Psyche specific but this is the most active list.

I received an email, (virus packed no doubt), on 2 different mail servers, 2 different domains; the message claims to come from root but the relay IP is in SOA somewhere in China. I don't understand why sendmail allowed it.
The e-mails had README.EXE embeded in them as a "*.wav" mime type.

This is all that was in the maillog.

Nov 7 00:35:08 mail sendmail[23448]: gA78Z5Y23448: [EMAIL PROTECTED], size=156475, class=0, nrcpts=1, msgid=<[EMAIL PROTECTED]>, proto=SMTP, daemon=MTA, relay=[211.101.140.97]
Nov 7 00:35:09 mail sendmail[23449]: gA78Z5Y23448: [EMAIL PROTECTED], [EMAIL PROTECTED] (0/0), delay=00:00:03, xdelay=00:00:00, mailer=local, pri=216178, dsn=2.0.0, stat=Sent

Thanks,
Joshua