Hello, I`m having an issue with the Mail server PTR configuration. Every time I send an email to a Gmail account, I receive an error: The IP address sending this message does not have a 550-5.7.25 PTR record setup, or the corresponding forward DNS entry does not 550-5.7.25 match the sending IP. As a policy, Gmail does not accept messages 550-5.7.25 from IPs with missing PTR records. For more information, go to 550-5.7.25 The PTR in my mail server control panel is showing that everything is fine. Any idea what I`m missing here?

Hello, Is there a specific IP displayed? Can you check whether it is effective through this website? https://www.whatsmydns.net/ aaP_esales2000

aaPanel_Kern getting: Error: Invalid IP address. I think it's because my DNS is managed by CLOUDFLARE. So I'll need my IP provider to add this PTR

Is it ipv6 or ipv4? aaP_esales2000

that my PTR DNS record The field name = @ Content = mail.mydomain.com

aaP_esales2000 My hosting provider is Contabo. I added a PTR record in my Contabo control panel. that the setting in my Contabo R.DNS control record management. Type : PTR Data: 101.150.163.XXX.in-addr.arpa ( XXX=i hide in my post my last 3 numbers ) IP: XXX.163.150.101 I have the same PTR record in Cloudflare DNS management. But I'm still getting a PTR error. Is it possible to give you admin access to my Aapanel?

PTR record missing

aaPanel_Kern

Hello,
If Google also displays IPv4, it may not be in effect, or it may be caused by a configuration error.
If it is ipv6, please check whether it is configured for ipv6

aaP_esales2000

aaPanel_Kern
That's my contabo Reverce DNS settings.
I added both IPv4 and IPv6 records.

I don't have A records in my Contabo DNS management. Because I host my DNS within Cloudflare.
All records (TXT, MX, A, etc) are managed in Cloudflare.
I also added a PTR record in Cloudflare. (Should I remove them?)

aaPanel_Kern

Hello, you should enter your domain name directly, such as: mail.xxx.com

aaP_esales2000

aaPanel_Kern Hello, do you mean at the IPv6 data at the Contabo Reverse DNS management?

aaPanel_Kern

Yes, server provider's RDNS for ipv4 and ipv6

aaP_esales2000

aaPanel_Kern I changed both IPv4 + IPv6 data to mail.mydomain.com

Should I also change it in Cloudflare DNS (the PTR record I made earlier)?

aaP_esales2000

aaP_esales2000
I have two PTR records in Cloudflare: one for IPv4 and the second for IPv6.

aaPanel_Kern

Is it normal now?
PTR records are generally set at the server provider

aaP_esales2000

aaPanel_Kern
No,
At the mail server control panel, the PTR is green (OK).
But, on the PTR testing tool, I`m getting an error: Invalid IP address/
btw, I now deleted the PTR records from Cloudflare.

aaPanel_Kern

Are you viewing using ipv4 or ipv6? At present, most tools do not support ipv6 query

aaP_esales2000

aaPanel_Kern IPv4.
I run a new PTR test using the nslookup command, and it works and points to my mail server domain.
At the whatsmydns.net online testing tool, it still gives an IP error.

aaPanel_Kern

aaP_esales2000
Hello,
It is recommended that you wait for the records to be synchronized. Is it normal now?
Please check directly using IP