The SMTP service in MailEnable Standard, Professional, and Enterprise before ME-10014, allows remote attackers to cause a denial of service via an SPF lookup for a domain with a large number of records, which triggers a null pointer exception.
MailEnable Standard, Professional, and Enterprise before ME-10014.
Denial of Services.
Please refer to the following webpage for the hotfix:
MailEnable - Hotfix Download Page, ME-10014: Monday, September 04, 2006 at http://www.mailenable.com/hotfix/.