PTR is a type of record in DNS system used for reverse DNS lookups (IP address to hostname)

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multiple ptr record in bind

I'm running some small ISP here and I own couple of IP ranges. I have given a few public IP addresses to some of my customer and they are running mail servers on them. They have demanded me to add ...
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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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Reverse DNS query of public IP returns localhost

I'm seeing this unusual behavior with reverse DNS lookups on this public IP Address: 222.253.228.79. Can someone explain what's going on? MXToolbox PTR lookup resolved localhost as the domain ...
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Reverse DNS show cname [closed]

I created a PTR record but it shows the this result: 88.7.4.62.in-addr.arpa. 86400 IN CNAME 88.64-27.7.4.62.in-addr.arpa. 64-27.7.4.62.in-addr.arpa. 86400 IN NS ...
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What should my reverse DNS be for my inhouse email server?

So I have an inhouse exchange server for the domain visaustralia.com. (email addresses are email@visaustralia.com) And when checking the reverse DNS of my static IP address with ...
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PTR Record setup with separate incoming and outgoing servers [duplicate]

The situation: Even though SPF, DKIM, and the entire mail formatting is optimized to score 10/10 on mail-tester, many outgoing mails are marked as spam in yahoo and outlook. The primary server sends ...
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60 views

Using PTR on SPF Record and Multiple Domain Pointing Single Server

Today I've checked my SPF is valid on some of the sites and invalid on some of the sites I've tested. Microsoft also couldn't see my SPF record for some reason while others can. (Sender ID ...
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PTR Record for Mail Server

Our email server is setup for Domain POP/ Mail Bagging with our ISP for receiving only. Our MX Record resolves to our ISP mail host address. We have 2 IP addresses (redundancy purpose), 1 from our ...
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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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73 views

CloudFlare and PTR records for reverse DNS

OK so I'm having a hard time configuring reverse DNS for my website protected by cloudflare. Since cloudflare is protecting my server, it's their IP and NOT the real server IP's that shows up when ...
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Trying to set PTR on CentOS 6.5

For the last 6 hours I've been trying to set a PTR for my server but I with no luck. Checking with host give me: Host 44.244.208.173.in-addr.arpa. not found: 3(NXDOMAIN) My /etc/named.conf includes ...
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119 views

Configuring Reverse DNS on Windows Server 2008, can't send email

I run a VPS on a Windows Server 2008 machine, and since I got it in January 2015 everything has been running fine, the server has IIS, DNS, and uses Mailenable for email exchange. I've been running ...
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132 views

Can I setup the PTR records of reverse DNS with different IPs?

I am very new into the Linux world. I'm trying to configure 3 Authoritative-Only DNS servers. I got everything set up, except for the zone of in-addr.arpa. I have the following servers with the ...
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1answer
130 views

SMTP DNS Validation with multiple mail servers behind multiple Public IPs

I know when a Mail server receives an e-mail, it performs a "DNS 3 way check" (I think this is also sometimes called FCrDNS) as a simply test against spammers. The way I understand it to work is as ...
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my host has no PTR record [closed]

when i check my host i get this host myIP xx.xxx.xx.103.in-addr.arpa has no PTR record So i dd this to my /var/named/domainname.com.db myHostname. IN A myIP xx.xxx.xx.103.in-addr.arpa. IN PTR ...
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2answers
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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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105 views

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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PTR for Linux VM on Azure

I have a Linux (Ubuntu) virtual machine running on Azure and this machine runs a website that sends email to registered users. This emails are greylisted on some mailning services. After some ...
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229 views

Reverse DNS record can't point to Domain name but it can point to IP [closed]

I am using parallels plesk for hosting my websites, Some days ago I tried to send emails from my mail server and the mails were going to spam,So i tried spam assassin to detect whats wrong. Here is ...
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3answers
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Is the Reverse PTR record fine

I've checked my email headers at http://mxtoolbox.com which says it is ok. But I'm not sure. MY server's FQDN is host.tariffplansindia.com and for my server's IP( 23.239.30.81) the reverse PTR record ...
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Appropriate PTR records for mail server [duplicate]

I realize this is a common question around here, but I'm having trouble understanding one part of it. I want to setup a mail server to send newsletters and other marketing emails for a few of my ...
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1k 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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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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1answer
912 views

setting correct PTR record for domain and postfix email server [closed]

I have a problem where I recently figured out, that describes this output! What steps to do to set the DNS PTR record, is the IP in reverse in the name needed? The zone of my domain is: ...
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63 views

DNS issue mail server

I tried to find an answer to this one around with no luck so far. I am not a sysadmin, but I work with mailings and one of our server presents some issues. I do not have personal access to the server, ...
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RDNS_NONE from spamassassin result, when it should be positive

When trying to do a spam test on mail-tester.com, SpamAssassin is giving me RDNS_NONE result. Can't quite figure out why! The result I get: -1.274 RDNS_NONE Delivered to internal network ...
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PTR records are not valid. but they should be!! - PTR quandary

I have a perplexing problem from my point of view. Not a mail server expert though so here goes; Using mail-tester.com, done a spam test for my mailserver and it's telling my PTR record is invalid, ...
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599 views

reverse dns not propagated

I defined reverse dns zone for server muq.ac.ir in name server which responds to name resolutions for domain muq.ac.ir server. Then I add a ptr record for ip address 80.191.92.199 with value ...
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PTR Webserver and Appserver

I'm a little confused about the setup of a PTR record for reverse dns lookup. We are hosted at Rackspace and we have a front end webserver and behind that an appserver. Users don't access the ...
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105 views

The correct PTR record in DNS

I'm confused with my DNS records. I own a domain (e.g. example.com).I've set A record for my SMTP server (e.g. smtp.example.com) for outgoing emails. The email address is (e.g. ...
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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 trigger ...
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What is the safe as AAAA record [closed]

What is safe for AAAA record. Short or full format? I set this e.g.: 4a01:20:18:0:5:8:8:30 This is IP from mail server. But when smtp sending email out i see problems in logs. Gmail return email as ...
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Reverse DNS (PTR) for Email

We are hosting our website (http://www.redappleapartments.com) with a hosting company in Sweden. And we are using godaddy as our email provider. So, our smtp servers are smtp.europe.secureserver.net ...
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Dns filezone setup with mx and spf

I am trying to create a mail server. I bought the domain mastermails.info on godaddy.com. I am struggling with the setup of DNS. Whenever I change something in the MX record to make my server ...
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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 ...
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Do reverse entries for name-server, need to match the mailserver name?

I need to setup PTR for a domain and lets say my domain is domain.com and I have my email addresses like email.address@domain.com. I came over this mailing-list article that says: The reverse ...
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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: <xxxxxxxxxxxxxxxx@xxxxxxxxxxxx.de>: host yyyyyyyyyyyy.yyyyyyyyyyyyy.de[33.33.33.33] refused to talk to me: yyyyyyyyyyyy.yyyyyyyyyyyyy.de (mxeue106) Nemesis ESMTP ...
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PTR record created, but not found

We are a small ISP, using linux DNS servers. Recently a client has asked us to create a rDNS zone for a specific IP address, which is used for a mail server. They keep getting message failures for ...
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122 views

Setting Up PTR to correct “Forged hostname” error

Our e-mails mostly get through fine, but here's an error I haven't seen before. Diagnostic-Code: smtp;550 5.7.1 ... Forged hostname for 66.132.221.45 >which resolves as www.medialabinc.net but ...
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How to add PTR record in my DNS? [closed]

Im trying to add a PTR record but the option is not available. The only options I have are listed in the image below. Which record type do I have to use to add PTR record?
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48 views

Google gmail block for no ptr of 4to6 ip address

When mail server got only ipv4 address and enabled 4to6 interface, gmail server block mail because of no ptr record of 4to6 address. Why...? Isn't 4to6 address not global standard...?
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hotmail doesn't accept my emails

I have installed and configure postfix as a mail server in ubuntu 12.04. I can send emails to gmail with no problem but I can't send them to hotmail when i enter in putty dig @ns1glr.name.com ...
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519 views

PTR record not valid for all domains

We have an issue sending emails to certain domains, namely Time Warner and Cox. Last week, we decommissioned our Exchange 2003 server and now our Exchange 2010 server is doing all of the transport for ...
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Assist in diagnosing reverse dns mismatch

We seem to have an occasional issue, whereby mail is bypassing our first three MX records, and going to our 4th MX record. This is purely a backup, and we think that the reason it is skipping the ...
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issue involving ptr record when sending email on digital ocean server

The Issue We have a website that sends email using php mail function and sendmail. We frequently get email rejected response emails from several destination email servers saying that we have an issue ...
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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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PTR record only added on IP owner side? no in DNS Zone files?

i wanted to add PTR record, to my domain so the reverse IP is in PTR points to my nameserver. So on my hosting IP provider i set my nameserver for the IP and it now shows in PTR (i used this ...
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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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1answer
598 views

How to match PTR record with a different domain?

I am a bit confused about PTR records and how to set it up correctly. This is the current setup: A website: domain.com, on this website I have a mailaddress info@domain.com. On domain.com I have an ...
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pointing different records to a CNAME record

I am trying to figure out the following and want to know "why" this is or is not possible. May an MX record “point to” a CNAME record? May a CNAME record “point to” a CNAME record? May an A record ...