[RFCI-Discuss] HELO required

[csmailreport]

On Dec 26, 2007 7:11 PM, Ovidiu C. <ovidiu at devstudio.eu> wrote:

> My MTA requires connecting clients to send a HELO first.
> 503 5.5.1 Error: send HELO/EHLO first
> Is this a violation of any RFC? Should I drop that requirement?
>


http://www.ietf.org/rfc/rfc2821.txt
Section 4.1.1.1 Extended HELLO (EHLO) or HELLO (HELO)
[Page 29]

> In any event, a
> client MUST issue HELO or EHLO before starting a mail transaction.


There's a MUST, so what you do appears to be ok and enforcing the MUST
keyword of the RFC.

I voluntarily elude the question on whether RFC 2821 is the current SMTP
standard or whether it's still RFC 821, which was written before the
MUST/SHOULD/MAY/MUST NOT keyword usage was codified.

(season's greetings btw :-)
-- N.
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