[Cialug] MTA HELO

[Kevin Smith]

Do not think that helps. There is no attempt to resolve it. It have to add
them to my_networks for postfix. Which I don't think is a good idea. I'd be
an relay for them then.
On Jan 12, 2014 1:19 PM, "Paul Gray" <gray at cs.uni.edu> wrote:

> On 01/12/2014 12:35 PM, Kevin Smith wrote:
> > #1 It's not A FQDN. Something like "cq1023". There is no attempt to
> resolve
> > the domain. It just has to correct syntax.
>
> No. "cq1023" would be considered a local alias, and not a valid domain.
>
> From the previously-cited RFC section:
>
>    The domain name, as described in this document and in RFC 1035 [2],
>    is the entire, fully-qualified name (often referred to as an "FQDN").
>    A domain name that is not in FQDN form is no more than a local alias.
>    Local aliases MUST NOT appear in any SMTP transaction.
>
>
>    Only resolvable, fully-qualified domain names (FQDNs) are permitted
>         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>    when domain names are used in SMTP.  In other words, names that can
>    be resolved to MX RRs or address (i.e., A or AAAA) RRs (as discussed
>    in Section 5) are permitted, as are CNAME RRs whose targets can be
>    resolved, in turn, to MX or address RRs.  Local nicknames or
>    unqualified names MUST NOT be used.  There are two exceptions to the
>    rule requiring FQDNs:
>
> By the clause emphasized above, the noyb.foo would also be invalid.
>
> -PG
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