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Questions tagged [reverse-dns]

Reverse DNS lookup is the determination of a domain name that is associated with a given IP address using the Domain Name System (DNS) of the Internet.

Reverse DNS lookup or reverse DNS resolution (rDNS) is the determination of a domain name that is associated with a given IP address using the Domain Name System (DNS) of the Internet.

Computer networks use the Domain Name System to determine the IP address associated with a domain name. This process is also known as forward DNS resolution. Reverse DNS lookup is the inverse process, the resolution of an IP address to its designated domain name.

Source: Wikipedia.

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Slave DNS server (bind) zone files transffered but data is unreadable

I've set up a slave DNS server on Linux using bind. On starting the named service the zone files transffered to slaves/ but the information in the files looks like its in strange computer symbols (i'm not sure what the correct term is for this)…
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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 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL…
user3521621
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Spamassassin RDNS_NONE matches, but there is a RDNS

I got a a little problem - spam assassin's RDNS_NONE-rule matches on my outgoing mails but there is a RDNS set for all hosts, that are in the delivery-chain. If I send an Email to "receipient-forwarding-address@example.com" which gets redirected to…
MyFault
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Hotmail/Outlook dumping apparently valid emails

I've written some software that operates a non-commerical contact list for clubs, where the server sends out admin mails to the entire club. The emails are received Ok on Yahoo, gmail, and AOL, but are silently thrown away by hotmail and outlook.…
EML
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How to add reverse dns record on cloudflare

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?
Anom
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Azure public/private dns resolution

Does anybody know if Azure has the same capability as AWS to resolve an external DNS hostname to the public IP address of the instance outside the network of the instance, and to the private IP address of the instance from within the network of the…
redsquare
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Bind9 reverse DNS configuration not working.

I am trying to set up a custom virtual DNS server in Ubuntu. When I try to nslookup with a windows 7 pc within the same virtual environment the reverse DNS seems te fail. My named.conf.local file: zone "linuxserver"{ type master; file…
Kipt Scriddy
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Cloudflare, reverse DNS and php mail ending up in spam folder

I've been using Cloudflare to host my DNS, and PHPMailer to send e-mail through ZOHOs SMTP servers with great success, but have found that all my e-mails are hitting Gmail, Zoho and Hotmails spam folders. When I disabled Cloudflare's DNS hosting,…
Joseph Szymborski
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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 ) mysite.net. IN NS …
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Global Reverse DNS look-ups not working

I am moving from an old server to a new one and everything went well until I got to the DNS server. I cannot get the reverse look-up to work. I cannot find any misconfiguration but I'm not an expert. rDNS locally works but from other Inet hosts it…
Schoors
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Assigning multiple IPv6 addresses on a Server

Let me uncover my intent. My host provides hundreds of IPV6 addresses free, but charge for an IPV4 address. I have several sites under one server and I was wondering if I can give each site/domain it's own ipv6 address. Is that even possible? If so…
andrewk
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DNS naming convention for multi-homed devices

Is it bad practice to have multiple IPs resolve via reverse DNS to the same hostname? Consider a router with multiple interfaces: 1 WAN and 3 separate LANs. Is it appropriate for all four IPs resolve to router.domain.com, or should the WAN interface…
mlambie
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How do I configure reverse DNS for a SMTP server

We use iis 6 to send out emails for our website but some email addresses bouce backs. It only appears to be 2 addresses. There is at least 100 different email addresses sent to at the same time as these. Here are the 2 different messages we…
user7468
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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 DNS Lookups, because it 1) seemed more complete to…
user62491
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setting the reverse dns for a email server

'm having some trouble with email on a dedicated server, with Windows Server 2008. I've reached the conclusion I have to setup reverse dns for the mail server. The current setup is this: The mail server is an exchange server rented from a 3rd party…
Tudor Carean
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