[Wylug-discuss] Re: SMTP standards (was Please confirm...)

[Peter Corlett]

James Holden <wylug at jamesholden.net> wrote:
[...]
> If you deny access based on an invalid HELO, you *will* lose legitimate
> mail, and you *will* be breaking RFC 2821 (sec 4.1.4).

It's not lost, it's just not being accepted. That's a subtle, but important
distinction.

[...]
> See RFC 821 and 2821.

The contents of RFC 821 are moot, as it is obsoleted by RFC 2821. RFC 821
should only be read if one is looking for a historical perspective, and
definitely not as a standards document.

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