There is a serious buffer overflow bug in all previous versions. This would permit a malicious SMTP server to overwrite the stack and hence a carefully crafted multiline response could download arbitrary code to be executed. Visit the specified URL for more info. The fix (0.8.11) was released on 2002-03-06
This is CAN-2002-1090 (cve.mitre.org). libesmptd is only used by balsa in the distribution.
Still not on the ftp servers?
An errata has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2003-109.html