[aclug-L] Re: DNS fubar for aclug-l host

[Chris Owen <owenc@xxxxxxxxxx>]

On Mon, 23 Sep 2002, John Goerzen wrote:

> On Mon, Sep 23, 2002 at 12:03:39AM -0500, Chris Owen wrote:
>
> > FYI, looks like the SMTP relay for the list is broken again.  No valid DNS
> > for 198.78.66.183.
>
> I take it you mean reverse DNS?  I've sent off a request to fix that.
> Not that this really means that SMTP is broken nor that DNS is truly
> FUBAR'd; just aggressive spam filters might inconvenience people for a
> bit :-)

STMP requires (at least in spirit) that the initiating machine have valid
DNS set up.  The RFCs don't actually say "you MUST" but they do say that
"machines will".

Some sites refuse to accept mail at all from hosts without it (sourceforge
I believe) while others will filter mail heavily when it lacks such DNS
entries (AOL does this).

Chris

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