[SOLVED] Debian mail server root mailbox received a strange message
I adminster a new production mail server under Debian GNU/Linux 5.0 lenny. The other day I installed and configured Postfix and Dovecot, with no spam filtering or virus detection tools or complements.
Today I noticed that the root mailbox has received a message from email@example.com. Is this some vulnerability? I'm not sure whether this represents a security problem or not.
Feb 15 11:16:10 postfix/smtpd: connect from b202.blue.fastwebserver.de[18.104.22.168]
Feb 15 11:16:12 postfix/smtpd: 9AB3E11104B9: client=b202.blue.fastwebserver.de[22.214.171.124]
Feb 15 11:16:12 postfix/qmgr: 9AB3E11104B9: from=<firstname.lastname@example.org>, size=405, nrcpt=1 (queue active)
Feb 15 11:16:12 postfix/smtpd: disconnect from b202.blue.fastwebserver.de[126.96.36.199]