MTA Open Mail Relaying Allowed (internal)
High Nessus Plugin ID 118017
SynopsisAn open SMTP relay is running on the host.
DescriptionNessus has detected that this internal SMTP server allows mail relaying.
SolutionReconfigure your SMTP server so that it cannot be used as an indiscriminate SMTP relay. Make sure that the server uses appropriate access controls to limit the extent to which relaying is possible.