[CentOS] SPAM on the List

Les Mikesell lesmikesell at gmail.com
Mon Jul 18 12:41:09 UTC 2011

On 7/18/11 5:43 AM, Stephen Harris wrote:
> On Sun, Jul 17, 2011 at 10:12:16PM -0500, Les Mikesell wrote:
>> On 7/17/11 9:37 PM, Stephen Harris wrote:
>>> 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
>>> 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).
>> That's a long way for saying it MUST be the name of that particular host (which
> I addessed that in the parenthetical; 821 did require it; 2821 doesn't.

Can you point me to the section?  I don't see anything there about the hostname 
having to match an interface address or being allowed to reject if it isn't - or 
even any advice on how clustered hosts representing one mail domain should 
represent themselves.

   Les Mikesell
    lesmikesell at gmail.com

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