Re: purely local DNS
Hi,
On Mon, Jul 15, 2024 at 09:55:06PM +0800, Jeff Pang wrote:
>
> >
> > I get:
> >
> > 0A032940922 657 Mon Jul 15 14:40:01 user1@mymachine
> > (Host or domain name not found. Name service error for name=example.com
> > type=MX: Host not found, try again)
>
> Any SMTP client which does not fall back to the A record when no MX records
> exists is fundamentally broken.
I think a confusion here is that the /etc/hosts file is not DNS. Not
all applications on a system will ask the NSS for host lookups; some
do go straight to DNS (as directed by /etc/resolv.conf). So the
assumption that putting an entry in /etc/hosts is just the same as
an A record in DNS is not always true.
It looks like OP has worked out how to tell Postfix not to use DNS,
so it would obey a hosts entry.
Thanks,
Andy
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