[CentOS] SPAM on the List

On Sun, Jul 17, 2011 at 09:07:38PM -0500, Les Mikesell wrote:
> There is no requirement for the greeting name to match any IP, and isn't likely 

RFC2821 says:
   -  The domain name given in the EHLO command MUST BE either a primary
      host name (a domain name that resolves to an A RR) or, if the host
      has no name, an address literal as described in section 4.1.1.1.

So, pretty much, HELO or EHLO greeting _must_ match to an IP.

(RFC821 actually wanted the HELO to match the connecting host, but
2821 just says it must be an A record or an address literal).

-- 

rgds
Stephen