centos plesk problem email

Hello
I have the problem
Malformed greeting or no A records found matching banner text for following servers, and banner is not an address literal. RFC5321 requires one or the other (should not be a CNAME). If this is not set correctly, some mail platforms will reject or delay mail from you, and can cause hard to diagnose issues with deliverability. Mailserver details:

XX.XX.XX.XX | WARNING: The hostname in the SMTP greeting does not match the reverse DNS (PTR) record for your mail server. This probably won't cause any harm, but may be a technical violation of RFC5321

Thank you for your help
Sylvain,

 

I don't understand. Is the first part one problem and missing PTR another?
Anyway, there is a tutorial on setting up DNS and reverse DNS. https://www.howtoforge.com/tutorial/setting-up-your-own-name-service-with-ispconfig/

 

I have one IP for server and one IP by domain.
The PTR IP give the domain
But the mail send by ip server --> PTR of the server is different the domain name.
If i change send by IP server I risk spam
Help me
Thank you very much
Sylvain,

 

It should be FQDN of mail server host.

I do not understand.
Try mxtoolbox.com with your domain.

 

My message in centos
25775C01A2A 201386 Sat Sep 1 08:48:38 [email protected]
(delivery temporarily suspended: host xxxxxx refused to talk to me: 554 5.7.1 You are not allowed to connect.)
my domain is francois-alain.com

with dnsstuff
Malformed greeting or no A records found matching banner text for following servers, and banner is not an address literal. RFC5321 requires one or the other (should not be a CNAME). If this is not set correctly, some mail platforms will reject or delay mail from you, and can cause hard to diagnose issues with deliverability. Mailserver details:

5.39.52.175 | WARNING: The hostname in the SMTP greeting does not match the reverse DNS (PTR) record for your mail server. This probably won't cause any harm, but may be a technical violation of RFC5321

 

You should repair the errors these tool tell yuo about. And fix that reverse dns:

Code:

host mail.francois-alain.com

use the IP-number that command shows for your mail host in next commad:

Code:

host 123.123.123.123

It should return mail.francois-alain.com.
Did you read the DNS tutorial?

 

First set proper fqdn host name of the Server and set its rdns.

 

You sure that you have ptr??
dig @8.8.8.8 -x IP.AD.r.es
ptr can set only owner AS of ip address aka provider