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This script is Copyright (C) 1999-2013 Tenable Network Security, Inc.
The remote SMTP server is vulnerable to a redirection attack.
The remote sendmail server accepts messages addressed to recipients
of the form 'user@email@example.com'. A remote attacker could
leverage this to reach mail servers behind a firewall or to avoid
detection by routing mail through the affected host.
Consult the sendmail documentation and modify the server's
configuration file to avoid such redirections. For example, this may
involve adding the following statement at the top of Ruleset 98, in
R$*@$*@$* $#error $@ 5.7.1 $: '551 Sorry, no redirections.'
Risk factor :
Medium / CVSS Base Score : 5.0
Family: SMTP problems
Nessus Plugin ID: 10250 ()
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