CRLF injection vulnerability in BSMTP.DLL in B21Soft BASP21 2003.0211, and BASP21 Pro 1.0.702.27 and earlier, allows remote attackers to inject arbitrary headers into e-mail messages via CRLF sequences in Subject lines.
https://exchange.xforce.ibmcloud.com/vulnerabilities/33211
http://www.vupen.com/english/advisories/2007/1113
http://www.securityfocus.com/bid/23134
http://www.hi-ho.ne.jp/babaq/basp21.html