(Cross-posting.  This came via ASSEMBLER-LIST):
On 2019-04-11, at 10:57:08, esst...@juno.com wrote:

> Hi, I seem to be having a problem with IBM MAIN.
> Every time I respond to a post, it is returned to me from 
> mailer-dae...@smtpout01.dca.untd.com  
> Unfortunately, your mail was not delivered to the following 
> address:<ibm-m...@listserv.ua.edu>:
> Sorry, I couldn't find any host named listserv.ua.edu. (#5.1.2)
> . 
This seems to be a problem with the OP's DNS.  Can't reprodude.
Finger-pointing time:
544 $ nslookup
> listserv.ua.edu
Server:         10.128.128.128
Address:        10.128.128.128#53

Non-authoritative answer:
Name:   listserv.ua.edu
Address: 130.160.0.24
> 
> set query=mx
> listserv.ua.edu
Server:         10.128.128.128
Address:        10.128.128.128#53
(Seems to be a DHCP server, but I get similar results from OpenDNS.)

Non-authoritative answer:
listserv.ua.edu mail exchanger = 10 mx1.ua.edu.
listserv.ua.edu mail exchanger = 10 mx2.ua.edu.

Authoritative answers can be found from:
> exit

> Is there An Administrator or Support email for for ibm-m...@listserv.ua.edu
> that I can contact.
> . 
Is there still a Darren?

> Paul D'Angelo

-- gil

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