DevHeads.net

Strange issue

Mail service is working except for delivery to a single host, which is
reporting a strange error:

postfix/smtp[13722]: 629D7A7DF9: to=< ... at kpbsd dot k12.ak.us>,
relay=none, delay=1099, delays=1097/0/1.5/0, dsn=4.4.3, status=deferred
(Host or domain name not found. Name service error for
name=mx4.kpbsd.k12.ak.us type=A: Host not found, try again)

root:# host kpbsd.k12.ak.us
kpbsd.k12.ak.us has address 74.123.240.28
kpbsd.k12.ak.us mail is handled by 30 mx3.kpbsd.k12.ak.us.
kpbsd.k12.ak.us mail is handled by 20 mail-gw.kpbsd.k12.ak.us.
kpbsd.k12.ak.us mail is handled by 40 mx4.kpbsd.k12.ak.us.
kpbsd.k12.ak.us mail is handled by 10 mx1.kpbsd.k12.ak.us.

root:# host mx4.kpbsd.k12.ak.us
mx4.kpbsd.k12.ak.us has address 74.123.240.23

Any help is appreciated!

Comments

Re: Strange issue

By Wietse Venema at 11/06/2018 - 12:04

Some DNS server replied to the MX request, with a list of
servers that include mx4.kpbsd.k12.ak.us.

Some DNS server replied to the MX request, with a list of
servers that does not include mx4.kpbsd.k12.ak.us.

$ host -t ns kpbsd.k12.ak.us
kpbsd.k12.ak.us name server ns1.acsalaska.net.
kpbsd.k12.ak.us name server xdns.kpbsd.k12.ak.us.
kpbsd.k12.ak.us name server ns2.acsalaska.net.
$ host -t mx kpbsd.k12.ak.us ns1.acsalaska.net.
Using domain server:
Name: ns1.acsalaska.net.
Address: 204.17.139.1#53
Aliases:

kpbsd.k12.ak.us mail is handled by 40 mx4.kpbsd.k12.ak.us.
kpbsd.k12.ak.us mail is handled by 30 mx3.kpbsd.k12.ak.us.
kpbsd.k12.ak.us mail is handled by 20 mail-gw.kpbsd.k12.ak.us.
kpbsd.k12.ak.us mail is handled by 10 mx1.kpbsd.k12.ak.us.
$ host -t mx kpbsd.k12.ak.us ns2.acsalaska.net.
Using domain server:
Name: ns2.acsalaska.net.
Address: 209.112.128.1#53
Aliases:

kpbsd.k12.ak.us mail is handled by 30 mx3.kpbsd.k12.ak.us.
kpbsd.k12.ak.us mail is handled by 10 mx1.kpbsd.k12.ak.us.
kpbsd.k12.ak.us mail is handled by 20 mail-gw.kpbsd.k12.ak.us.
kpbsd.k12.ak.us mail is handled by 40 mx4.kpbsd.k12.ak.us.

Wietse

Re: Strange issue

By Wietse Venema at 11/06/2018 - 12:53

Wietse Venema:
Sorry, I missed that it was listed in the response.

$ host mx4.kpbsd.k12.ak.us xdns.kpbsd.k12.ak.us.
Using domain server:
Name: xdns.kpbsd.k12.ak.us.
Address: 74.123.240.3#53
Aliases:

mx4.kpbsd.k12.ak.us has address 74.123.240.23

This took a several seconds to respond to my
query from NY state. Not sure what is going on.

Wietse

RE: Strange issue

By Kevin Miller at 11/06/2018 - 12:51

I didn't see the errors Wietse did, but when I ran your domain through the report at <a href="http://www.dnsstuff.com" title="www.dnsstuff.com">www.dnsstuff.com</a> it noted this (among a few other minor things):
transitioning domain of kpbsd.k12.ak.us does not designate 74.123.240.23 as permitted sender | softfail | 74.123.240.23

Need to update your SPF record...

...Kevin