Issue mail server not properly configured - leading to block

[leopixelstudios]

Server operating system version

AlmaLinux 8.10 (Cerulean Leopard)

Plesk version and microupdate number

Plesk Obsidian 18.0.77 Update #2

Hello! I am going nuts on this issue.. I've had a mail server for a couple of years now without any issue.. last week I've added a new domain that needed mail services as well.. since then I've been blacklisted in spamhaus... Now, the part that I'm pulling my hair over... I wanted to dispute the blacklisting with spamhaus BUT, what they say is an error, is not something (or I think) I can fix..

The HELO points to the OVH server name
the IP address is of course the OVH server IP Address

the mail server is mail.xyz.com with ip address 1.2.3.4
the rDns point back to the domain mail.xyz.com

when I sumit my request to spamhaus.. that's what they give me ....

The A record for the HELO domain does not match the sending IP address.
Of course it won't!! I don't have the server name in my a record, I have the domain name

The reverse DNS domain does not match the HELO domain.
the reverse DNS points to the domain name, not the server name..

what can I do to fix this!
I have another domain with an email service with the same type of configuration (except it's their domain name) .. so I'm afraid they'll get blacklisted as well


thx.

 

[Kaspar]

Sounds like maybe the server host name hasn't been properly configured at the mail server (it happens sometimes). See support article on how diagnose and solve: https://support.plesk.com/hc/en-us/...ontain-the-correct-hostname-on-a-Plesk-server

 

[leopixelstudios]

Yeap, that seems to be an issue.. now the problem I have is that the ip addresss that the helo points to is an address I have in plesk, but no on my server host (ovh) .. how do I change this so that the server uses the "real" server ip address?

thx

 

[Kaspar]

@leopixelstudios I am afraid I don't quite understand what you mean. Does you're server host at OVH show/use an internal IP (in the 10.x range)?

 

[leopixelstudios]

Here's the result from spamhaus... so I understand about the server name HELO not being properly setup.. that's will be taken care of..
The issue I have is with the IPV4 record.. this is not an IP that originates from OVH, but one that has been created in Plesk..

but this address doesn't see to be working (it's a dedicated address with no submask..)

and the bottom part, the PTR will be changed to the same HELO value, and the PTR will resolve to this address 149.. but the HELO should also point to the 149 address and not the 51...