Questions tagged [ptr-record]
PTR is a type of record in DNS system used for reverse DNS lookups (IP address to hostname)
202
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How do I check a PTR record?
I need to check a PTR record to make sure that a script I have is sending emails which will actually be received by my users and not be incorrectly marked as spam.
I understand that the ISP which ...
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46
votes
3
answers
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Why multiple PTR records in DNS is not recommended?
I often read that using multiple PTR records in a DNS configuration is not recommended.
However, the reasons are often vague, or not so obvious, naming:
"it can cause problems",
"can ...
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19
votes
2
answers
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views
PTR record (rDNS) for multiple domains on a shared IP address
I host multiple domains on a single IP address:
cats.com
A @ --> 10.20.30.40
A mail --> 10.20.30.40
MX @ --> mail
dogs.com
A @ --> 10.20.30.40
A mail --> 10.20.30.40
MX @ --> ...
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18
votes
6
answers
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views
Reverse DNS records not registered when using DHCP
I've stumbled upon a strange behaviour with Windows machines, which seems to be fairly consistent between all Windows versions from Vista/2008 to 8.1/2012 R2; it doesn't happen instead when using ...
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12
votes
2
answers
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Reverse DNS is not a valid hostname [closed]
I help a friend run a server, which includes a mail server. http://mxtoolbox.com reports that our reverse DNS is not a valid hostname.
The reverse DNS currently points to domain.com. Should it point ...
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11
votes
5
answers
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views
How to setup PTR (Reverse DNS) at Godaddy DNS manager
My hosting provider already did PTR setup. Now i have to setup it at my DNS holder i guess. What am i supposed to do at my Godaddy account. thank you.
my ip : 64.250.113.235
and you can check my ptr ...
- 576
11
votes
4
answers
25k
views
Gmail does not accept mail from a new server
I am setting up a new server and discovered that Gmail does not accept emails from this server.
I checked Exim logfiles and found the following:
Our system has detected that this\n550-5.7.1 message ...
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10
votes
4
answers
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views
Reverse DNS Setup for an IP with multiple domains
I am trying to clarify my Reverse DNS PTR lookup for a domain. I have a server with a single IP addresses and multiple accounts, all sharing that IP address;
My PTR is currently:
24.210.31.in-addr....
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9
votes
5
answers
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views
How important are PTR records for Email Servers?
Does anyone know of any studies done to show how much email will be rejected if there is not ptr record for the SMTP banner name of an email server?
Are reverse checks always done when enabled, or ...
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7
votes
7
answers
3k
views
Importance of PTR records on nameserver IP's?
I have not yet experienced any DNS failures due to a missing PTR record, but am wondering:
Is there any added value in having a valid PTR record on a nameserver IP-address?
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2
answers
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How to determine which DNS server has the authority to set rDNS (PTR records)?
or to re-phrase... How to determine to whom authority has been delegated to set rDNS?
Background
In a multi-tier environment, where a block of IP's is assigned, then further split and assigned (...
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votes
2
answers
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views
How are DNS PTR records managed?
As I understand it, an IP address-owner can set up a DNS PTR record for his IP address to map the IP addresses to its host names. There are some things about this I don’t understand. I’ve managed ...
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7
votes
3
answers
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how to add a REverse PTR Record on Amazon Route 53?
if i have the below ip 168.144.254.X and i would like to add a ptr record in amazon in the form of
X.254.144.168.in-addr.arpa what should be in the name field and what should be in the
value field
...
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6
votes
7
answers
8k
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Does a PTR record prove anything about the sender's email domain?
My outgoing mail server has problems reaching some recipients. This happened after we changed ISP for our dedicated IP address. I think it might be due to PTR records, but I cannot be sure.
My ...
- 1,172
6
votes
5
answers
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SMTP Reverse DNS Mismatch
My dedicated server ns382087.ovh.net resolves to 46.105.98.72 and hosts multiple domain with several dedicated IP addresses. Each new IP address is added to /etc/network/interfaces
Among them, the ...
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6
votes
1
answer
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Gmail does not accept mail from a new VPS server with PTR setup
I have PTR records setup but I am not able to deliver mail to Gmail accounts:
host gmail-smtp-in.l.google.com[2607:f8b0:4004:c08::1b] said:
550-5.7.25 [2a01:4ff:f0:a7b6::1] The IP address sending ...
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6
votes
2
answers
11k
views
Entering multiple DNS TXT values as a single TXT entry, with each value in " marks, but separated by spaces
I have done this with other DNS providers but I'm stuck on UltraDNS's DNS management interface. I need to enter multiple values in a TXT entry so they resolve as a single string with each value in &...
5
votes
2
answers
16k
views
Do I need to Set-up PTR record in SPF Setting?
I have set-up the RDNS from my hosting provider for the ip address to resolve to "maximus.example.com". After that, do I also need to add the PTR records to the SPF Text details in my DNS zone file as ...
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2
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Are PTR records added only by the ISPs that provide and manage the IPs?
I am administering a network with many locations and work with multiple providers I checked out with my DNS provider to change the PTR records for one of the IPs, they replied:
Dear Sir,
We ...
5
votes
2
answers
2k
views
How to confirm who is responsible for serving reverse DNS (PTR) requests an IP block?
Before anyone answers "ask your ISP" or "ask your hosting provider", please read in full.
Scenario:
I own a domain name mydomain.example, and a publically routed IP block (say 192....
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5
votes
3
answers
14k
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How should I set up my PTR Record?
I am trying to properly set up my ptr record as I have noticed that some email notifications sent from my website have gone to spam for certian people, and I am having trouble figuring out exactly ...
Henry Wrinkler
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votes
4
answers
12k
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How do you know if reverse dns is setup correctly on your server
Total newb question I know, but I just want to be sure.
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votes
3
answers
640
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What services require properly configured PTR records?
I manage a few DNS servers (Bind9, Windows Server 2008 R2) that are used internally. I have always taken the time to make sure that the correct corresponding PTR records were configured for Reverse ...
user62491
4
votes
2
answers
29k
views
How do I set up a reverse zone file?
I have this zone file in bind:
$TTL 86400
mysite.net. IN SOA ns1.mysite.net. admin.mysite.net. (
2006012008
86400
3600
604800
86400
)
...
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4
votes
2
answers
17k
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Delivered to internal network by a host with no rDNS
Recently our emails started going to spam for recipients at Gmail and Yahoo mail.
I ran a SpamAssassin test, and have found the following:
pts rule name description
0.0 ...
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4
votes
1
answer
7k
views
How to add reverse dns record on cloudflare [closed]
I need to set PTR record on my cloudflare account, because all outgoing mails are going to spam. I do not see ptr record in my cloudflare account. Can I use txt/srv record instead?
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votes
1
answer
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What steps to do to set the DNS PTR record, is the IP in reverse in the name needed?
I had the following error:
<[email protected]>: host yyyyyyyyyyyy.yyyyyyyyyyyyy.de[33.33.33.33] refused to
talk to me: yyyyyyyyyyyy.yyyyyyyyyyyyy.de (mxeue106) Nemesis ESMTP ...
4
votes
5
answers
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Discover server responsible for serving a PTR for a specific IP?
Just as the title reads: How do I discover what nameserver is the authoritative nameserver for PTR records for a specific IP?
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4
votes
4
answers
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How to determine if my mail server is configured correctly?
Does anyone know of an online service (similar to the ones that tell you if a site is up or down) that can connect to a specified mail server and perform checks to see if it is configured correctly?
...
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3
votes
5
answers
1k
views
DNS, PTR, Mail Server HELP!
I am not really sure which route to take. Here is my current setup.
We host our web server on RackSpace Cloud (moved from EC2)
Previously we hosted our own name servers, now we use RS (RackSpace) ...
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3
votes
3
answers
4k
views
Moving from one ISP to another; DNS PTR question
We are going to be moving from one ISP to another in the next month or so, and I will be changing the TTL's down to 60 seconds on the DNS servers that I have authority for, but our current ISP has ...
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3
votes
2
answers
9k
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which one is best for PTR record: domain or hostname
I have a VPS with the following IP: 82.197.45.124
domain: example.com
hostname: server.example.com
PTR record: 82.197.45.124 > server.example.com
There is no an "A" record for "server"
mood@desk:...
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3
votes
3
answers
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DNS PTR record when domain on shared IP address
I own a typical shared IP hosting plan and domain.
I can modify the DNS of the domain from the control panel.
The mailserver shares the same IP address, so my typical DNS config is:
www.mydomain.com ...
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3
votes
2
answers
5k
views
How to add PTR record for a /16 IP block in BIND using $GENERATE directive?
I'm trying to reverse map a block of IP using PTR record to some special name so their usage can be easily reflected by a simple nslookup.
For example, here's a nslookup result:
# nslookup 172.17....
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votes
1
answer
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Best practices for managing the IP addresses you own in DNS and their PTRs?
I was wondering how exactly the big companies go about managing all the IP addresses that their public servers use, especially in respect to setting up correct PTR-records.
This is very important, ...
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3
votes
4
answers
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DNS and PTR for SMTP: shared IPs and subdomains
This question is similar to others about PTR and DNS for SMTP, but one specific aspect was unanswered: what if one machine does SMTP and HTTP on the same IP address. For example:
SMTP at mail.example....
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3
votes
1
answer
3k
views
Who is responsible to set up reverse DNS (PTR) for a domain, the DNS host or the MX host?
I have the dns for a domain on GoDaddy and the MX configured for Gmail. All set up ok with spf, dkim and dmarc, and all passes all online tests, beside: intodns.com reports this error for the domain ...
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3
votes
1
answer
2k
views
Is having the same PTR hostname valid for multiple ip addresses? [duplicate]
Currently I have the following setup with two hostnames and two ips:
cheeze1.mydomain.com IN A 123.123.123.111
111.123.123.123.in-addr.arpa IN PTR cheeze1.mydomain.com
cheeze2.mydomain.com ...
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2
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Windows AD DNS is automatically adding PTR records for CNAMEs and I want this to stop
Preface: I am not a Windows admin. I am a Linux admin.
I have a Windows 2016 server with AD DNS that handles internal DNS forward and reverse lookups.
Somewhere, somehow, some process is ...
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3
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1
answer
6k
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Why does SSH report "reverse mapping checking getaddrinfo failed" even when PTR record is set?
I'm trying to setup a cluster using a private network on subnet 10. One machine has two interfaces, one to connect to the regular network and the other to connect to all the nodes on subnet 10. This ...
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2
votes
2
answers
878
views
Reverse DNS in bind 9 failed and VPS
My Ip address is 1.2.3.4 (single ip for mail and dns server) and my domain name is example.com, I use Centos 7 and bind 9
output of command:
`host 1.2.3.4`
is:
`Host 4.3.2.1.in-addr.arpa. not ...
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votes
3
answers
5k
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How to know if reverse PTR record is correct for emailing purposes
I send emails for [email protected] with my own server. When using dig -x xxx.xxx.xxx.xxx with the IP of my server, I get:
;; QUESTION SECTION:
;xxx.xxx.xxx.xxx.in-addr.arpa. IN PTR
;; ...
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1
answer
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Is it possible to set a PTR record for Github Pages hosting?
Icelandic domains (.is) require that their domains support reverse DNS, which means configuring PTR records on the hosting server.
Is it possible to set up a PTR record for GitHub Pages site hosting? ...
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2
votes
2
answers
834
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Configuring PTR records!
One of our client requires PTR records to be configured. Their ISP does not support the same. Can I create a PTR record on my name servers for an IP owned by a different ISP?
2
votes
1
answer
158
views
Reverse DNS record is not recognized
I have a problem creating a reverse DNS record.
First of all, I have created a new zone. IP was aaa.bbb.ccc.ddd and Domain was ccc.bbb.aaa.in-addr.arpa.
Second, I have edited the just created zone and ...
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2
votes
1
answer
2k
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PTR record format for IPv6
What is the difference in the following two IPv6 PTR formats?
4.3.0.0.0.0.0.0.0.0.0.0.0.0.0.0 IN PTR smtp.example.com.
4.3.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.3.0.0.0.0.a.4.f.7.0.6....
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2
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PTR and A record must match?
RFC 1912 Section 2.1 states the following:
Make sure your PTR and A records match. For every IP address, there
should be a matching PTR record in the in-addr.arpa domain. If a
host is multi-homed, (...
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2
votes
1
answer
323
views
PTR record needed? Where?
I have a problem which I think can be resolved by adding a PTR record. Email isn't working for [email protected]. I looked up the SMTP issues on mxtoolbox.com which returned the following:
SMTP ...
- 129
2
votes
1
answer
5k
views
My ISP set up a PTR record for my mail server, but some places aren't seeing it
I have a VPS running Windows 2008 server with plesk 9, which I am using for email. I asked to my ISP to add a PTR record, which they did but my mails still droping into spam box.
I have checked ...
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2
votes
1
answer
131
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$GENERATE'd records competing with real PTR records
I have a zone (1.168.192.IN-ADDR.ARPA) $GENERATEing PTR records from 1-254.
However, I also have some custom PTR records, within that range, that are declared aside from the
generate directive.
...
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