Email Deliverability Error

IMRJS

Member
Dec 10, 2019
10
0
1
Canada, ON
cPanel Access Level
Root Administrator
Hello everyone, I have temporary lost my IT worker due to health reasons . I have general knowledge of cPanel and was setting up DMARC when I noticed this under email deliverability. Can someone please help me create this A record? I have tried myself but I still get this message I’m probably not formatting it correctly.

What would the “name”, “TTL”, and “record” entry be? Also any comments are welcome.

“The system uses an alternate HELO of “ip-199.168.xxx.xx.reverse.ourhost.ca” when sending mail from the “cp1.ourserver.cc” domain. “

“The system sends the domain “ip-199.168.xxx.xx.reverse.ourhost.ca” in the SMTP handshake for this domain’s email. “ip-199.168.xxx.xx.reverse.ourhost.ca” does not resolve to any IP addresses.

To fix this problem, create a DNS “A” record for “ip-199.168.xxx.xx.reverse.ourhost.ca” whose value is “199.168.xxx.xx”.”


Thank you,

R
 

cPAdminsMichael

Well-Known Member
Dec 19, 2016
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Denmark
cPanel Access Level
Root Administrator
Hi R,

For most optimal mail server setup, you'd need to configure proper reverse DNS with related DNS record.
Ex.:
rDNS: ip-address points to DNS A-record
DNS: A-record points to ip-address

Usually you'd have to ask your hosting provider to change/create rDNS. Note that a "ip-199..." rDNS address is not the most optimal one. It's recommended that it's a proper server name.
 
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cPanelLauren

Product Owner II
Staff member
Nov 14, 2017
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To elaborate on this a PTR or reverse DNS entry resolves the IP address of a server to the hostname. In order for it to work properly, you must have a valid FQDN as the hostname.

What is the output of the following via SSH (if you're unsure how to access ssh it might be easiest to do so from WHM>>Server Configuration>>Terminal).
Code:
host IPADDRESS
*Please ensure you modify actual domain names/IP's in your output

To be sure what, if anything is noted in /etc/helo The command to run is:
Code:
cat /etc/mailhelo
 

IMRJS

Member
Dec 10, 2019
10
0
1
Canada, ON
cPanel Access Level
Root Administrator
Hello, thank you for the reply. Please see my output below... Thank you!

To elaborate on this a PTR or reverse DNS entry resolves the IP address of a server to the hostname. In order for it to work properly, you must have a valid FQDN as the hostname.

What is the output of the following via SSH (if you're unsure how to access ssh it might be easiest to do so from WHM>>Server Configuration>>Terminal).
Code:
host IPADDRESS
*Please ensure you modify actual domain names/IP's in your output

Host IPADDRESS not found: 3(NXDOMAIN)

To be sure what, if anything is noted in /etc/helo The command to run is:
Code:
cat /etc/mailhelo
ip-199.168.xxx.xx.reverse.ourhost.ca