Finally all my records are ok (SPF, DKIM, DMARK). i did email test with score 8.8/10 at https://www.mail-tester.com my problem: -1.274 RDNS_NONE Delivered to internal network by a host with no rDNS This may be a false-positive, please check the reverse DNS test below to confirm or not this issue Your IP address 85.xxx.xxx.48 is associated with the domain 85-xxx-xxx-48.ip.kis.lt. Nevertheless your message appears to be sent from server.MYDOMAIN.com. You may want to change your pointer (PTR type) DNS record and the host name of your server to the same value. Here are the tested values for this check: IP: 85.xxx.xxx.48 HELO: server.MYDOMAIN.com rDNS: 85-xxx-xxx-48.ip.kis.lt
Spoke with internet provider, he can't change PTR record, it's automatic for all users, so my server rDNS will be 85-xxx-xxx-48.ip.kis.lt anyway. Is there another way to make Helo same as rDNS without server renaming to 85-xxx-xxx-48.ip.kis.lt ?
you only need to change the helo setting within postfix. Code: postconf -e smtp_helo_name=....ip.kis.lt maybe aswell postconf -e myhostname=....ip.kis.lt postconf -e smtpd_banner=....ip.kis.lt and reload postfix after
tried this: postconf -e smtp_helo_name=....ip.kis.lt quality result was 1.2/10 because "we can't find any email server here:....ip.kis.lt (no A record)"
Using your ip address as the helo hostname is perfectly valid: Code: postconf 'smtp_helo_name=[85.xx.xx.48]' I wouldn't expect that to change your mail-test.com results though, as RDNS_NONE should still fire because you don't have forward<->reverse dns matching. Your internet provider needs to add an A record to match the PTR record. Right now the PTR resolves to a name, but that name does not resolve to an address (mismatched or otherwise).
You can overwrite the hostname in the master.cf by adding " -o myhostname=anything.you.want" to any service. The default for smtp_helo_name and smtpd_banner is myhostname. There is no need to change various values.
