RMX records are a good way to prevent being bombarded by bounce messages when someone spoofs your domain in their spam. However, since domains are cheap, I do not think it will do much to stop spam. If spam is profitable, why not buy a domain for $10 - $30 and spam from it? You can even use open relays point your RMX record at them. I think RMX offers improvments we should add to SMTP, but it (like any thing else) is not a silver bullet.
Posted by moore at 01.10.03 17:05