Re: Dynamic DNS vs valid A-record check

On May 5, 2005 10:24 am, Geoffrey Welsh wrote:
> Andrew McGill said:
> > Try again later -- our technicians are working on the
> > problem. (Just in case the point was missed -- the DNS
> > server for the A record and the destination SMTP server
> > share the dynamic IP address.)
> > [...]
> > The only reason it is missing is because the DNS server
> > is disconnected temporarily (along with the mail server).
>
> Unless I'm really missing the picture here, you're violating almost every
> DNS best practice:
>
> You really shouldn't be operating a DNS server on a dynamic IP address.
> You really shouldn't be operating a DNS server on a link that goes down
> regularly.
> You really should have a secondary DNS server anyway.

May I suggest either www.ZoneEdit.com or www.GraniteCanyon.com? Either will
provide you with proper DNS service at incredibly reasonable rates. You may
even want to try www.dyndns.com for that matter.

Heck, I'll provide you with DNS and e-mail service for unreasonable rates if
you really want :-)

>
> When there are no authoritative DNS servers for a domain, the domain for
> all practical purposes doesn't exist and it is perfectly reasonable for an
> MTA to bounce a message to it.
>
> Your four proposed workarounds are all not required to correct your
> problem. The simple solution is to move your DNS to a reliable fixed IP
> address, where it will respond with both MX and A records at all times, and
> the comings and goings of your mail server will result only in delivery
> delays.

--
Ean Kingston

E-Mail: ean AT hedron DOT org
URL: http://www.hedron.org/
I am currently looking for work. If you need competent system/network
administration please feel free to contact me directly.