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 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).
>>
>> 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