SOLVED OP address used for HELO

Jcats

Well-Known Member
PartnerNOC
May 25, 2011
806
156
168
New Jersey
cPanel Access Level
DataCenter Provider
Hello,

Do you have a valid rDNS setup on the IP?

You can check using dig in SSH:

Code:
# dig -x 172.217.8.174 +short
Replace with your IP.

If it is, its possible you have the following option checked in WHM > Exim Configuration

Reference /etc/mailhelo for outgoing SMTP HELO

If yes, go into /etc/mailhelo and make sure its set up properly like so:

*: server.hostname.com

or whatever is set as your rDNS
 

papazetis

Registered
Mar 17, 2017
4
0
1
Manchester
cPanel Access Level
Root Administrator
Yes I have setup rDNS correctly.

My hostname is set to the the same I get from "dig -x".

Exim Configuration is like this
Untitled-1.jpg

And I change /etc/mailhelo to my server rDNS but I am still getting the same error
 

Jcats

Well-Known Member
PartnerNOC
May 25, 2011
806
156
168
New Jersey
cPanel Access Level
DataCenter Provider
Most likely a false positive then, as long as your server hostname is setup properly along with the rDNS, I don't see why you would be having this problem.

Can you send yourself a test email and check the headers of the email then check the HELO manually, does it show an IP?
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,913
2,203
363
Hello,

Could you verify if the issue persists when temporarily disabling the "Introduce a delay into the SMTP transaction for unknown hosts and messages detected as spam" option in "WHM >> Service Configuration >> Exim Configuration Manager >> Basic Editor"? I've seen reports that this option prevents third-party utilities such as MXToolBox from completing a check of the RDNS entry.

Thank you.