On 10/31/01 at 15:09, Warren Michelsen wrote:
> SIMS sends "Sending 220-Stalker Internet Mail Server V.1.8b8 is
> ready.\r\n220 ESMTP is spoken here. You are welcome\r\n" when a MTA
> connects. Is there something in an RFC that requires that the host
> name be sent in the greeting? I ask because I just tried out
> www.dnsreport.com and it complains (in the resulting report):
>
> WARN Mail server host name in greeting WARNING: One or more of your
> mailservers claims to be a host other than what it really is. This probably
> won't cause any harm, but is a technical violation of RFC821 4.3.
> WARNING: mail.mdcclxxvi.com. claims to be host Stalker.
> WARNING: smtp.az.net. claims to be host Stalker.
RFC 821, section 4.3 is entitled 'SEQUENCING OF COMMANDS AND REPLIES.' The bit
referred to above reads:
> One important reply is the connection greeting. Normally, a receiver will
> send a 220 "Service ready" reply when the connection is completed. The
> sender should wait for this greeting message before sending any commands.
>
> Note: all the greeting type replies have the official name of
> the server host as the first word following the reply code.
>
> For example,
>
> 220 <SP> USC-ISIF.ARPA <SP> Service ready <CRLF>
Going by that, a SIMS server's host name should be interpreted as 'Stalker',
as in the warning message given above, since that's the first word after the
220 response code. However, there's a pretty wide range of greeting messages
being given out by a lot of different servers out there these days, and many
of them do not include the server's name. Perhaps one of the folks on the list
with encyclopedic knowledge of the RFCs (don't try to hide, we know you're
there...) can tell us mortals if there's a later RFC that supercedes 821 on
this point? If not, should SIMS be made to comply with RFC 821?
Christopher Bort | [EMAIL PROTECTED]
Webmaster, Global Homes | [EMAIL PROTECTED]
<http://www.globalhomes.com/> | PGP public key available on request
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