Email problem.

[BlackThorn]

Hi there,

We can't send any email to some companies. E.g.:

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  deu**-****@gmx.de
    SMTP error from remote mail server after initial connection:
    host mx00.emig.gmx.net [212.***.**.9]: 554-gmx.net (mxgmx013) Nemesis ESMTP Service not available
    554-No SMTP service
    554-Bad DNS PTR resource record.
    554 For explanation visit http://postmaster.gmx.com/en/error-messages?ip=**.**.119.20*&c=rdns

* ip adress.

After these error we just send email to GMX and report this problem. Now we get their response and they said this:

-----------

"Dear Sirs,

thank you for your query.

Your email has been rejected because of one of the following issues related to your mail server configuration:

- no domain name is assigned to your server's IP in the DNS (domain name system)
- your DNS Records point to a list of dynamic IP addresses or to your provider's default entries
- the DNS record that you are using is not accepted by us.

In order to be able to deliver emails to our system, please ensure that your server has a valid domain name (Fully Qualified Domain Name - FQDN) and a reverse lookup (rDNS).

We would also advise you to choose a name that it is different from the default entry of your provider, like "123-123-123-123-static.provider.tld".

A good format would be, for example: "mail.yourdomain.tld".

Should you have further queries regarding the correct configuration of your DNS entry, please contact your server provider.
For general information about RDNS, please refer to the following link:
https://en.wikipedia.org/wiki/Reverse_DNS_lookup

MAAWG Sender Best Common Practices:
https://www.m3aawg.org/sites/default/files/document/M3AAWG_Senders_BCP_Ver3-2015-02.pdf#8"

-----------

I tried it but problem not solved. How to we add that example (mail.yourdomain.tld) in ACP? I already select "Create Reverse IP Lookup" before create DNS Record but problem still not solved.

Thanks.

 

[zEitEr]

Hello,

rDNS or PTR records should be created in your server provider control panel, it is not Directadmin's side. If your server providing company does not allow to change rDNS/PTR then you should open a ticket with them and request the changes of the records.

 

[BlackThorn]

zEitEr,

We have a dedicated server (with root/admin ssh, etc.). It's possible to do this? If you tell steps, we will try it in our server.

Thanks.

 

[zEitEr]

Do you own/rent /24 or /23 IP4 subnet? If not, then you have no way to modify rDNS/PTR records on your side, contact your DC or server provider company for this.