The background: there are a couple of domains registered with GoDaddy, and hosted on a Linux server with someone else. It is a fully unmanaged box to which I have full control. The host setup PTR for the box. The question: can anyone help guide me through filling in the information necessary for reverse DNS to work so our emails don't hit the spam folder? I have no clue how to set this up. Thanks for your time!
In most cases, the PTR is managed by the provider that hosts the server. Ask their support to setup the rdns record for the IP address.
Shouldn't an A record, or some DNS information referencing the PTR be entered into the ISPConfig control panel as well as the GoDaddy CP?
Your server has a hostname and this hostname has to exist in DNS of course. This has to be set on the authoritive DNS server of the domain, this can be godaddy or ISPConfig, depends on where you delegated and manage this DNS zone. The PTR is something different, the PTR is basically the DNS record of the IP address and this is normally set at your hoster. https://de.godaddy.com/community/Managing-Domains/Need-to-add-PTR-records-for-my-server/td-p/30165
Thanks for the help guys. Finally figured it out. For anyone as confused about it as I...lol.... in SSH, get your PTR record using Code: dig -x xx.yy.zz.aa Should look something like aa.zz.yy.xx.in-addr.arpa. Hostname can be retrieved on the command line using the command hostname Then in ISPConfig > DNS > Records > PTR In the Name box add: Code: aa.zz.yy.xx.in-addr.arpa. In the Canonical Hostname box paste the hostname from command line. Most people know it of course, but it's an easy way to do it. Don't forget to add a "." after it. Save.
Does that solve Your original problem: I thought You need to have PTR record point to the e-mail server hostname, so other servers checking can see IP-number resolving back to the hostname claiming to be the sender. Or is the mail server hostname aa.zz.yy.xx.in-addr.arpa.?
If someone said what I did is incorrect, well, I certainly can't argue it. lol. However, testing with 4 different online tools, they all state rDNS is working. Perhaps all by accident? If there's a better way let's explore it! It's good having the correct info out there for others as well. At least for me, it needs to be spelled out with specifics. This is all new and confusing.
