On Mon, 8 Sep 2003, David Landgren wrote: > I hope you succeed in doing in your MTA of choice. If you can drop the > connection before DATA, you can save a lot of bandwidth. > > You may safely reject any SMTP connection that announces itself this > way (HELO compuserve.com)
Just be sure you only match on "compuserve.com" as if you match subdomains you'll be blocking email from a lot of people. > yahoo.com is another one to look for. Their > servers announce themselves using FQDNs. Hotmail doesn't, may they > roast in hell. It's that a given? > If you get this to work there are two other easy ones to block: HELO > 1.2.3.4 (where 1.2.3.4 is the public IP address of your MTA) and HELO > example.com (where example.com is your domain name). And HELO localhost as well as HELO [ any unqualified hostname ] Jason Clifford -- UKFSN.ORG Finance Free Software while you surf the 'net http://www.ukfsn.org/ ADSL Broadband available now
