Email & PTR Issues

[Matthew Pounsett]

On 7 November 2017 at 10:31, James Pifer <jep at obrien-pifer.com> wrote:

> Hello. I'm looking for help with an issue I've been fighting for some time.
>
> Background:
> Running BIND 9.9.
> Forwarding UDP & TCP Port 53 through firewall.
>
> I have issues emailing to certain domains. I use my own mail server to
> deliver mail. It is currently not sending through SMTP Relay. The failure
> says that I have a missing PTR record. For example:
>

You may have configured reverse DNS on your DNS server, but that reverse
DNS zone is not delegated to you, so nobody else's DNS server will ever
query yours for that PTR record.  It's being managed by swbell.net, who
returns NXDOMAIN for that lookup.

I'm presuming swbell.net is your ISP.  You either need to get them to
delegate reverse DNS for your address block to you, or have them set up the
PTR record(s) you require in their DNS.

; <<>> DiG 9.11.2 <<>> +trace -x 108.212.144.25
;; global options: +cmd
. 223262 IN NS h.root-servers.net.
. 223262 IN NS a.root-servers.net.
. 223262 IN NS c.root-servers.net.
. 223262 IN NS g.root-servers.net.
. 223262 IN NS i.root-servers.net.
. 223262 IN NS m.root-servers.net.
. 223262 IN NS d.root-servers.net.
. 223262 IN NS e.root-servers.net.
. 223262 IN NS k.root-servers.net.
. 223262 IN NS j.root-servers.net.
. 223262 IN NS l.root-servers.net.
. 223262 IN NS b.root-servers.net.
. 223262 IN NS f.root-servers.net.
. 223262 IN RRSIG NS 8 0 518400 20171119210000 20171106200000 46809 .
OL3PH3LpCrgzyohVZas9X42iwOpXsYD8CRkNiJZ1Oy6jwIfb8Shy57XN
5noPxtghdHBLutGBIdMwL2rA5AR2yaaVgRC6TM0eSqeixFFeETu6EV89
ZpBgSDNSVL1fmwnSoni1mZRj+F0iLT+Q+t/DveqVwh4o/2czWsnfiqTk
89jZRB30W3Ja9E4EMNW1+WNCkib1KTFvnwwgfYGPtjyFSUIQrv1vOByN
R3Yu11YYkgauY0Q5C7vcUkchwsDlkaWIgnvEZQXRUM3Ibi1QX6kq1g6Q
JW9mSzf7YqrPfU90HId+TSfuvTL4MrkN81iQXSl37+sldtJzDSKOKQij 7Wj1hg==
;; Received 525 bytes from 8.8.8.8#53(8.8.8.8) in 7 ms

in-addr.arpa. 172800 IN NS e.in-addr-servers.arpa.
in-addr.arpa. 172800 IN NS f.in-addr-servers.arpa.
in-addr.arpa. 172800 IN NS d.in-addr-servers.arpa.
in-addr.arpa. 172800 IN NS c.in-addr-servers.arpa.
in-addr.arpa. 172800 IN NS b.in-addr-servers.arpa.
in-addr.arpa. 172800 IN NS a.in-addr-servers.arpa.
in-addr.arpa. 86400 IN DS 53696 8 2
13E5501C56B20394DA921B51412D48B7089C5EB6957A7C58553C4D4D 424F04DF
in-addr.arpa. 86400 IN DS 63982 8 2
AAF4FB5D213EF25AE44679032EBE3514C487D7ABD99D7F5FEC3383D0 30733C73
in-addr.arpa. 86400 IN DS 47054 8 2
5CAFCCEC201D1933B4C9F6A9C8F51E51F3B39979058AC21B8DF1B1F2 81CBC6F2
in-addr.arpa. 86400 IN RRSIG DS 8 2 86400 20171120120000 20171107110000
36264 arpa. VMG4mxJ1Kdcm4QsK/i8qP+EzIubfzl2Hlo9hG1aDAZ8/y+GIKz+bYGVG
f1wZKCZAfFPMrDBIVAhghK3eTQooY12oUEGICksbtSukvDQcL6LwqZKf
yfPuSW29Qj+hsdmeDZAwRiaCjAeMf5tucgX7yr9SD08gCTJcaPltjdlv QuM=
;; Received 740 bytes from 198.41.0.4#53(a.root-servers.net) in 18 ms

108.in-addr.arpa. 86400 IN NS r.arin.net.
108.in-addr.arpa. 86400 IN NS u.arin.net.
108.in-addr.arpa. 86400 IN NS x.arin.net.
108.in-addr.arpa. 86400 IN NS y.arin.net.
108.in-addr.arpa. 86400 IN NS z.arin.net.
108.in-addr.arpa. 86400 IN NS arin.authdns.ripe.net.
108.in-addr.arpa. 86400 IN DS 42060 5 1
DCD6C8C3D6F68C6A4495EA2C1C5DA76BBCB466E2
108.in-addr.arpa. 86400 IN RRSIG DS 8 3 86400 20171114073514 20171024172923
50761 in-addr.arpa.
l8UaM1j4VZ14OnIdBoH7b3xgFPyueh6A82423FAp53ohpOf+enHrh26s
O0Vaq3LnIk3fTED6bspZCour38srNTmWWKvYRSzAQ+vAsarAo//Cma4U
nCLAQAJqQRrUzQ2ZXC/AZoC+E0jfyA0saXC3mQb76+iwPx8hLJnw6wD1 Vhj/mwU=
;; Received 387 bytes from 203.119.86.101#53(e.in-addr-servers.arpa) in 236
ms

212.108.in-addr.arpa. 86400 IN NS ns1.swbell.net.
212.108.in-addr.arpa. 86400 IN NS ns3.sbcglobal.net.
212.108.in-addr.arpa. 86400 IN NS ns2.swbell.net.
212.108.in-addr.arpa. 10800 IN NSEC 213.108.in-addr.arpa. NS RRSIG NSEC
212.108.in-addr.arpa. 10800 IN RRSIG NSEC 5 4 10800 20171121173125
20171107163125 14796 108.in-addr.arpa.
aTXD4vS9gVjOP9uzozcUdXhSFuCXKqKUKUpZnHuStZO7QPqXKnB8EOoj
F0lRJDkdvGNng/BwMLj22EFC3kWtFhOTLl2l6oq7tjb+fhGJCWCY5Pbp
Cyc3VSiIU7wCPa2HDJbYMTLKLm4UZOBA1Mlp+0rcGDosGcnqmRl7oGNh Y6A=
;; Received 348 bytes from 192.82.134.30#53(y.arin.net) in 18 ms

212.108.in-addr.arpa. 3600 IN SOA ns1.swbell.net. rm-hostmaster.ems.att.com.
21 10800 900 604800 7200
;; Received 131 bytes from 65.68.49.6#53(ns3.sbcglobal.net) in 92 ms
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