Re: [44net] Bad MX records in the ampr.org DNS - 44net

25 May 2015

...
  Subject:
 Re: [44net] Bad MX records in the ampr.org DNS
 From:
 John Ronan &lt;jpronans(a)gmail.com&gt;
 Date:
 05/25/2015 11:00 AM

 To:
 AMPRNet working group &lt;44net(a)hamradio.ucsd.edu&gt;

 On 25/05/15 09:52, Rob Janssen wrote:
  linux.ei2edb.ampr.org/MX
'ei2edb.ampr.org' has no address records (A or AAAA)
 os2.ei2edb.ampr.org/MX 'ei2edb.ampr.org' has no address records (A or AAAA)
 ei7gm.ampr.org/MX 'bbs.ei7gm.ampr.org' is a CNAME (illegal)
 ei7gm.ampr.org/MX 'dubbbs.ei7gm.ampr.org' has no address records (A or AAAA)
 486.ei9fk.ampr.org/MX 'ei9fk.ampr.org' has no address records (A or AAAA)  
Delete them,

 They are all ancient DNA.

 Regards
 John
 EI7IG 
After consulting Brian I have deleted all MX records that point to names for which no
address
record exists, including 4 of the above.  867 records in total.

Looking at CNAME and dotted address in MX records will be the next step.
Note that an MX record must have a hostname that in turn has A and/or AAAA records.
So MX records that contain e.g. "44.0.0.1" are not allowed.  Neither are MX
records that have
a name that in turn is a CNAME pointer.

Most mail software will probably handle those bad MX records, so I have not yet deleted
them.
I advise those that make use of their MX records to fix them (replace the IP address with
a
hostname that resolves to that address, and replace a name that refers to a CNAME with
the
name that the CNAME points to).

Then I can check things again in some time.

Rob