IBM AIX 5.2 and earlier distributes Sendmail with a configuration file (sendmail.cf) with the (1) promiscuous_relay, (2) accept_unresolvable_domains, and (3) accept_unqualified_senders features enabled, which allows Sendmail to be used as an open mail relay for sending spam e-mail.
http://marc.info/?l=bugtraq&m=105284689228961&w=2
http://security.sdsc.edu/advisories/2003.05.13-AIX-sendmail.txt
http://www.kb.cert.org/vuls/id/814617
Source: MITRE
Published: 2003-06-16
Updated: 2017-07-11
Type: NVD-CWE-Other
Base Score: 5
Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N
Impact Score: 2.9
Exploitability Score: 10
Severity: MEDIUM