[RFCI-Discuss] about FQDN for our smtp servers

[Derek J. Balling]

On Apr 11, 2006, at 1:22 PM, Alan Brown wrote:
>>  some MTAs will reject you you if
>> your helo doesn't resolve.
>
> So is this.(*)

No, this is not a RFC violation.

By definition the argument must be a FQDN.  An FQDN is defined as  
something resolvable, I forget the specific location where it is so  
defined. Thus, if you HELO with something that isn't resolvable, it  
isn't an FQDN, and therefore you have not HELO'ed in a syntactically  
valid manner.

> I have to say that given the size of Netease, I am extremely surprised
> to see an admin here asking basic questions which should have been  
> well
> understood before deploying and administering large mail systems.

Given the size of Netease, it's entirely possible he is one among  
many admins, possibly a junior? Who knows. Cut the guy some slack.  
He's asking and wanting to learn instead of just going off on his own  
and doing what-the-fuck-ever he wants. :-)

D

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