Questions tagged [ptr-record]
PTR is a type of record in DNS system used for reverse DNS lookups (IP address to hostname)
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Is it possible to receive email for aliases of multiple domains on a single KVM?
Tl dr; Is it possible to receive email for aliases of multiple domains on a single KVM?
I had a Digital Ocean server with multiple websites hosted on it, and needed email aliases of more than one of ...
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2answers
78 views
Iptable rules for SMTP NAT to borrow static public IP of data center server
I'd like to run my own mail server on my (decent) home ISP connection rather than trusting my emails to any data center provider - mostly because I already have a machine running.
Although in practice,...
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0answers
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Do I need a PTR (rDNS [Reverse DNS]) record if using an SMTP mail relay (Mailgun, Mailjet, Send Grid, etc.)?
My cloud hosting provider wants to charge for setting up a PTR record, which I'm not up for.
As I use Mailjet as an SMTP relay server, do I even need to have it setup? Or will all my emails reverse to ...
0
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1answer
87 views
Using own bind name server allowing reverse dns for own mail server
I successfully created my own email server running on Ubuntu but other mail servers refuse incoming mails from my server because there is no reverse dns (PTR record).
The configuration looks like
own ...
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3answers
188 views
Subdomain, PTR and MX Record Confusion
I am lost in DNS and rDNS (PTR) record setting for the following scenario:
I have my main website example.com running in Digital Ocean at IP 192.0.2.4
In Digital Ocean control panel I have the ...
2
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1answer
102 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 ...
0
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1answer
19 views
PTR recored Issue
We have 2 Mail servers ( Internal and External) the External is hosted by ISPA with ip address of 62.xxx.xxx.xxx, we use to have the internet from the same ISPA, and the PTR record is already setup.
...
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3answers
400 views
450 4.7.25 Client host rejected
On #Exchange2013 I am getting the error message as follows,
generated the error '[{LRT=};{LED=450 4.7.25 Client host rejected: cannot find your hostname, [xxx.xxx.xxx.130]};{FQDN=};{IP=}]'.
I am ...
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1answer
434 views
ptr-record in Bind9 [closed]
I have att small business internet and trying to avoid paying them 50 bucks to make ptr-records as I need them. I am pretty sure this is corrrect, though it seems like they might have a block or some ...
0
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1answer
286 views
Reverse DNS PTR record
I have a dedicated server (Ubuntu 18.04 with virtualmin & webmin) which is hosting 7 WordPress sites on it. I have set up MX, DMARC, SPF and DKIM records for each one of them but dns tests online ...
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2answers
424 views
MX record in a reverse zone
I am taking a DNS course on Linux Academy.
In one of the lab, they define a reverse zone. In this zone they add MXs records.
Does it make sense to have MX record defined in a reverse zone?
Details:
...
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1answer
101 views
| rDNS | IP gets resolved with a wrong hostname
I've been trying to set up rDNS so my IP could get resolved to my hostname in a program which has a built in rDNS lookup feature. I had done everything I was suggested (ask my ISP to make a PTR record ...
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1answer
61 views
Unknown PTR record in DNS; it’s not there in Cloudflare DNS Settings [closed]
(1.) There is an extra, unwanted, unexpected, unadded PTR record in my DNS settings, with value set to the Domain Name "mediati.net". You can see it here in MxToolbox Reverse Lookup:
MxToolbox shows ...
3
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1answer
1k 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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1answer
1k views
What is Wrong with My Reverse Lookup PTR Record
I can't figure out why my PTR record does not work on my new server. This configuration worked on my old server and I already confirmed with my host that they added a record on their end so that 72....
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0answers
66 views
Should PTR for domain controller be automatically created?
Reverse look up for my domain controller doesn't work.
Invoke-Command -Credential $Cred -VMName $vmname -ScriptBlock {Install-WindowsFeature DNS -IncludeManagementTools}
Invoke-Command -Credential $...
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1answer
88 views
How does a PTR record help receiving mail servers detect spam?
Specifically, if I create a mail server with IP 1.2.3.4 and hostname bademail.example.com, and make sure I have a PTR record from that IP to that hostname, what has that achieved?
In a real world ...
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0answers
236 views
When sending an email to Gmail, I get a delivery error email back to me
I have a VPS and when I send an email, I get a delivery error email with one of the following (the email is not in the spam, it is not being sent at all):
all hosts for 'gmail.com' have been ...
0
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2answers
125 views
Scrape subdomain IPs using PTR records
I'm looking for a solution to an obscure problem. For security policy reasons we have a workstation using PeerBlock with a block list that essentially blacklists the entire internet, and then an allow ...
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2answers
459 views
domain name system - rDNS is not exist [closed]
I need some help with Reverse DNS as I have got a problem with it. I have setup rDNS on my hosting provider which I use rdns1.example.com and I have a server hostname which it is gateway1.example.com. ...
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1answer
892 views
Setting up a global PTR record for entire server
Digital Ocean droplet running CentOS 7 with Plesk Panel installed.
Trying to improve the email deliverability and overall state of the mail server.
Want to set up a PTR record and apply this to the ...
1
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1answer
1k views
Reverse DNS PTR entries matching to MX entries
Confusion over what reverse DNS applies to and where it gets set... Although there are answers on how to do this, I still cannot determine what needs to get done and why.
A domain is registered at ...
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2answers
94 views
Different PTR record resolve in DNS my DNS server and the public DNS server
I have created a PTR Record for Mail matters on my DNS server which can be seen as public. But after a day it is not recognized by mxtoolbox.com. I have checked every possible syntax errors but there ...
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2answers
711 views
Google Cloud Compute Enable PTR Record - Invalid value for field 'resource.publicPtrDomainName
I have followed the proceedure in google cloud documentation...https://cloud.google.com/compute/docs/instances/create-ptr-record
verify domain ownership (done and verified)
in google cloud console, ...
google-cloud-platform
3
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2answers
4k views
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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2answers
5k 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 " ...
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2answers
2k views
Single DNS and E-Mail server with multiple public IP addresses
On our site we have two internet providers, with public IPs on each link.
We manage locally our DNS and SMTP server.
We want to publish our DNS and SMTP server on both links, to get redundancy.
My ...
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1answer
182 views
Which domain should the IP PTR record resolve to?
I am trying to set up a mailserver alongside my webserver, example.com, at IP address 192.0.2.1
I have installed the usual suspects; Postfix, Dovecot, Roundcube,
ClamAV milter, and OpenDKIM. I ...
0
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1answer
402 views
Google cloud load balancing and reverse DNS
I have a domain example.com pointing at a Google Cloud load balancer. Requests get served by one of several Compute Engines behind the load balancer.
The load balancer ip is 1.2.3.4
Now when I send ...
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2answers
48 views
Setting up email server SPF without access to IP PTR
What is or is there a proper way to set up SPF without setting the IP's PTR?
because I don't have access and want to know if there's an alternative method
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1answer
90 views
new email send to Outlook.com never deliver but reply on Outlook.com email does
I dont know where i could start. There is the probleme.
If someone send me an email from Outlook.com, i received the email. If i reply, he will received my email.
If i write a new email and send it ...
0
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1answer
1k views
How delegate the reverse DNS lookup to another name server?
Consider this scenario:
A VPS server with one ip address (1.2.3.4) running "bind name server" to resolve requests.
An organization which gave that ip address to the VPS server. Obviously the ...
0
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1answer
95 views
Multi-view DNS PTR issues
I am seeing some problems with PTR zone resolution, and I can't quite figure out what is not configured correctly.
Summary:
1) I've been delegated authority for my PTR zone (246.237.204.in-addr.arpa,...
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1answer
282 views
bind9 on server locally for mail ptr record with cloudflare as name servers
I am using cloudflare's name servers for example.com with a cname for www - these are filtered through cloudflare.
In cloudflare, I have an mx record pointing to mail.example.com and a mail A record ...
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3answers
4k views
How to know if reverse PTR record is correct for emailing purposes
I send emails for test@example.com 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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1answer
1k views
Reverse PTR record lookup not working with dig
As mentioned here, having a Reverse PTR record is key for successful email sending and delivery from one's own server. In order to check if it's correctly set for my server, I tried:
dig -x 111.111....
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1answer
560 views
BIND9 can't resolve in-addr arpa
I am trying to configure my nameservers to resolve a PTR zone for which we are authoritative. I have several forward zones that work just fine, but when I try to resolve a PTR, the result does not ...
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1answer
658 views
PTR record won`t update
Currently, my server is running Ubuntu Server. I had the domain "rosresurs.msk.ru". A bit later I've bought a new domain called "rosresurs.net". But when I ran dig command, I saw, that old domain is ...
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1answer
50 views
How to allow rDNS(PTR) record to point a specific domain?
Maybe it sounds too complicated, but I will do my best to explain. The problem is the following: some domain is pointing my servers IP address. How can I block that rDNS (PTR) record, so I can attach ...
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1answer
123 views
Delegating reverse dns records - Bind (Ubuntu Server)
I have got a mail server attached to a static provided by my ISP. Our dns service is run by buddyns DNS service because our ISP blocked 53 by default. The DNS service is excellent, but i dont know how ...
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2answers
1k views
BIND DNS: how to override RR generated by $GENERATE directive?
I'm running an authoritative nameserver for a reverse /16 zone, where every IP is mapped to a custom subdomain.
This is achieved by a zone file with 256 $GENERATE directives, for example (subnet 11.22....
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1answer
436 views
How to set reverse ptr in azure Cli?
I'm trying to add reverse ptr on my Azure VM server.
I tried via powershell and now I'm trying CLI direct on Azure panel.
NOTE: My VMs are static ip.
az network public-ip update --resource-group ...
0
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1answer
207 views
how to properly configure DNS when server hosting one domain is sending mail from another?
i'm trying to figure out how to properly setup TXT and PTR records in the following case:
- one domain is hosted on the server 1stdomain.com on IP 1.2.3.4
- it uses remote mail server for sending ...
0
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1answer
519 views
can not having a PTR record affect website performance?
I moved my ptr from my maindomain.com to my mail.maindomain.com. Now i could swear my website was faster before, but i can't prove it. Could not having a PTR record affect performance in any way? ...
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1answer
95 views
PTR lookup to authenticate emails
gmx.com and mail.com are using PTR lookup to authenticate emails. For example, I used 1.1.1.1 to send email as from gmail.com to gmx.com, gmx.com would do PTR look up for 1.1.1.1 see if its gmail.com.
...
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1answer
3k views
Reverse DNS for multiple IP address with same domain name
We have a setup where our day-to-day email is sent via GSuite for Business and our bulk email (newsletters, etc) are sent through an Exchange server (to avoid Google's sending limits). Both are sent ...
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1answer
1k views
Receiving mail from Gmail delayed - PTR issue?
One of our partners receives our mails with noticeable delays. The same mail sent to two addresses under their domain are sometimes delivered at their server hours apart (checked in the actual server ...
2
votes
2answers
77 views
Possibility to synthesise resource records in BIND?
is there possibility to synthesise resource records in BIND, similar as in KnotDNS with following command?
synth_record "(forward`|reverse) <prefix> <ttl> \<address>/<nn>";`
...
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1answer
578 views
How to Add Pointer Record in Reverse Lookup DNS Zone (Windows Server)
I want to add a pointer record in reverse lookup zone in windows 2012 Server. The pointer record should point to a delegated zone defined in a forward lookup zone.
I want to answer any DNS query: b....
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1answer
5k views
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 ...
