Re: ISO service which will return a mail domain as valid or not.

I don't have DIG. I do not load option the DNS server option part of IBM i
as I got tired of IBM lagging behind in updating that to the latest level
of bind and getting dinged by scanning services (including IBM) for running
obsolete versions of bind.
This is the reason, when I submitted a request for the sql service
dns_lookup, that they do NOT require that optional part of the OS.

On Tue, Apr 7, 2026 at 10:06 PM Bdietz400 <bdietz400@xxxxxxxxx> wrote:

Not in front of a keyboard, but I wonder if you could use the DIG command
to verify the MX associated with the domain.
--
Bryan Dietz

On Apr 7, 2026, at 7:00 AM, Rob Berendt <robertowenberendt@xxxxxxxxx>

wrote:

You send an email and you get a
Reason: 5.1.2 - Bad destination host ('000', ['DNS Hard Error looking up
aasdfdfsdf9788asfdsf8d87f8d.com (MX): NXDomain'])

You decide to get proactive and scrub a file containing all these
destination addresses. You want to run something like
select customer_number, customer_name, email_address,
email_domain_valid(email_address)
from customer_master
where email_domain_valid(email_address) = '0'

Does anyone have something like the desired email_domain_valid?

I can worry about the performance later (like grouping by domain names, a
list of whitelisted domain names, etc) So let's not chase that squirrel.
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