1. R

    Whitelist rDNS

    There is a very large hosting service provider in my country that has several IP blocks on blacklists but unfortunately as they are large and have many customers we need to adapt to this problem that they do not solve so I would like to know if it is possible to do some configuration in exim...
  2. OfficialHax

    Dual PTR?

    Hi. We're having some issues regarding this dedicated server. We run alot of small dedis but this one is causing alot of issues. Our rDNS is perfectly fine. Our current IP is and rDNS is static. But for some super odd reason I am getting 2...
  3. R

    RDNS configuration error

    I am having this error in the RDNS configuration of my dedicated server: The system failed to complete validation of “xxx.xxxxxxx.xxx”'s “PTR” because of an error: (XID h23c98) DNS returned “SERVFAIL” (code 2) in response to the system's query for “xxx.xx.xxx .xxx.in-addr.arpa”'s “PTR” records...
  4. M

    SOLVED Possible rDNS issue

    I'm experiencing issues sending emails to, in particular, gmx addresses. The error received indicates a bad PTR record: Action: failed Final-Recipient: rfc822;[email protected] Status: 5.0.0 Remote-MTA: dns; mx00.emig.gmx.net Diagnostic-Code: smtp; 554-gmx.net (mxgmx015) Nemesis ESMTP Service not...
  5. blackwidow02

    SOLVED 550 Invalid RDNS entry for xxx.xxx.xxx.xxx

    Hi cPanel Community, Would like to seek assistance regarding this error. One of our client is sending an email to a specific recipient address, then based on the track delivery logs, the first log shows an invalid RDNS entry and then followed by an Accepted log (the same sender and recipient)...
  6. A

    Correct rDNS / HELO when using /etc/mailhelo and /etc/mailips ?

    The issue In cPanel -> Email Deliverability for domain1.co.uk it shows: "Problems Exist (Reverse DNS)" The system sends “domain1.co.uk”’s outgoing email from the “” IP address. The only PTR value for this IP address must be “domain1.co.uk”. This is the name that this server sends with...
  7. T

    DNS Errors Occurred (Reverse DNS) even if PTR is shown by "host" command

    Ticket: 93574906 . Following problem applies to ALL accounts under WHM, even if server's main IP is resolved as reversed. Although no problem with AutoSSL. My Provider has already set IP to resolve to the hostname I use, in case it helps. Nevertheless, by host command, seems that Main IP...
  8. icp77

    Problems Exist (Reverse DNS)

    Buenas Tardes, tengo una consulta por favor, he revisado que a raiz de las actualizaciones de cpanel y los nuevos features implementados, han surgido algunos errores que antes no se mostraban, como el siguiente: Problems Exist (Reverse DNS). Tengo en varios servidores hosting con ip dedicada...
  9. N

    rDSN PTR for dedicated server, one shared IP and one dedicated IP

    Hello, I am having some questions about my PTR records at dedicated server. This is the idea: We have one shared IP address where we have ~100 web sites. Yesterday we bought another IP address and we are planing to buy a domain, install some newsletter PHP script and to offer it to our...
  10. V

    Changing hostname for ptr record error

    Hola como están, por favor me gustaría saber si pueden ayudarme con el siguiente problema, mi proveedor de VPS me dice que tengo que cambiar el nombre de host al siguiente: mail.estesemidominio.com pero cuando lo intento cambiar WHM me da este error: The hostname may not begin with "mail."...
  11. W

    SOLVED Reverse DNS (RTP) not working

    Hi, I use my own VPS from Namecheap with a WHS/cpanel system. I have setup my RTP Record with this tutorial How to Configure Reverse DNS for BIND in WHM - cPanel Knowledge Base - cPanel Documentation and this But it is now working. If I do a Reverse DNS Lookup for my IP 162.213.xxx.xxx I...
  12. G

    SMTP error from remote mail server after RCPT TO

    Hi guys, I'm having some issues with the smtp. I am currently using the cpanel version 74.0.4. I'm developing an email system, and some of the emails that I send get back with an 550 error with the message: DHCP-RSA-AES256-GCM-SHA384: 256 CV = no: SMTP error from remote mail server after RCPT...
  13. J

    SOLVED rDNS and PTR Record

    Hi all, Just wondering on this topic. I Have always run a dedicated or VPS server with rDNS and PTR records set as DOMAIN.COM only. Is it better practice to use your hostname and mail, so YOURHOSTNAME.DOMAIN.COM and MAIL.DOMAIN.COM if you have several IP's available? Or is it just as safe to...
  14. R

    Setting rDNS and PTR records Question

    Hi everyone. I've read tutorials on this and tried a few things but I can't figure out what is going on and I hope someone can help. I have 3 ip records: (numbers changed to protect the innocent) (my actual server) - 1st glue record - nameserver 1 - 2nd glue record -...
  15. L

    rDNS errors on secondary shared IP

    I have been receiving ongoing complaints about client's email being rejected, and it is because the shared IP they are on doesn't have a proper rDNS record. I have been filing tickets with them (IBM) for 2 months and their response has been the same, the rDNS record is correct. It finally...
  16. J

    The PTR record for the address points to an unknown host name.

    Hi I'm not an advanced root I have install new cp/whm host - everything works correctly hostname created , nameserwers works fine but if i check somedomain on my host using DNS check tool i have this info SOA Reverse for xxx.xxx.xxx.xxx points to an unknown host name...
  17. M

    How can change Ptr RDNS on WHM BIND

    Hello, My ptr record is -> x.yyyy.com I want change it on -> x.yyyy.com how can change this ?
  18. I

    Setting Up Reverse DNS

    Dear All, I've 2 IP in my server, 1 for main shared IP, and the second one is dedicated IP for one of my domain. My question is where do i have to set the second IP for reverse dns? (for emailing purposes). Because as you know, the hostname already been used for the main shared IP. Sorry if...
  19. F

    Change PTR Record

    Hello, I'm trying to get de-listed from CSI, then have a default PTR, so, my IP address point to domain name like "ipXXX.ip-XXX-XXX-XXX.net", how I can change this value to another like? I attached the screenshot of the error. Thanks for any help.
  20. C

    How to setup RDNS

    Hi, How do you set RDNS please?