Email DNS Configuration

calvynlee

I had set up a small vps using cyberpanel, done configure the necessary setting include rdns.

unfortunately, when I send a test to mail-tester.com, I see this server.example.com, which I had no clue where to amend.
(I don't remember I had configured such URL during my installation 🤔)

Anyone can point me some direction?

screenshot here:
https://ibb.co/dJ21Jsr

CyberPanel

You can use this guide to change from server.example.com

https://cyberpanel.net/docs/2-ssl-for-postfix-dovecot/

Also read -> https://blog.cyberpanel.net/2018/05/15/achieve-10-10-email-score-with-cyberpanel/

calvynlee

thank for the direction,

when I try to issue ssl for my mail server, I receive this error message.

Cannot issue SSL. Error message: 0,283 Failed to obtain SSL for domain. [issueSSLForDomain]

Is there any additional step I require to take before I issue ssle for my mail server?

calvynlee

I searching around the forum, found one of your reply recommend to add this code:

# wget -O - https://get.acme.sh | sh


After that I manage to add ssl for my mail server. I solve partially of the problem, but from mail-tester, I still see below error:


Your IP address 45.xx.xx.xx is associated with the domain server0.domain.asia.
Nevertheless your message appears to be sent from domain.asia.

You may want to publish a pointer (PTR type) DNS record with a value of
domain.asia or use server0.domain.asia as hostname in your mail software

Here are the tested values for this check:
IP: 45.xx.xx.xx
HELO: domain.asia
rDNS: server0.domain.asia


Basically my rnds is set in my vps control panel. I am no clue where should further troubleshoot?

Anyone can give me some direction? I believe I need to do some setting for PTR?

calvynlee

I solve the problem by change my rdns from server0.domain.asia to domain.asia.

CyberPanel

Great, thanks.