Reverse DNS is not a valid Hostname
I installed postfix with webmin on Ubuntu14 LTS. For the reverse DNS, the name of the droplet is mydomain.com.
The result of postconf smtpheloname is:
root@Ubuntu-14LTS-NY1:~# postconf smtp_helo_name postconf: warning: /etc/postfix/master.cf: undefined parameter: mua_sender_restrictions postconf: warning: /etc/postfix/master.cf: undefined parameter: mua_client_restrictions postconf: warning: /etc/postfix/master.cf: undefined parameter: mua_helo_restrictions smtp_helo_name = $myhostname
Why smtpheloname reply $hotname, that looks strange.
And I have two warnings with [http://mxtoolbox.com ](http://)
- Reverse DNS is not a valid Hostname
- Reverse DNS does not match SMTP Banner -
In main.cf, I have:
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no myorigin = /etc/mailname mydestination = mydomain.com, localhost
In /etc/mailname there is mydomain.com
What can I do to fix these warnings?
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