On 2016-10-13 08:30, vod vos wrote:
Oct 12 14:38:50 postfix/smtpd: warning: hostname 4d1q192.urbanchipps.net does not resolve to address 184.108.40.206: Name or service not known
are these spams, how can I do? thanks.
no its more just a badly configured mailserver that have not performed fully qualified dns reverse name for that ip
basic: host <ip> dig <ptr> does not match same ip vs ptr and you cant do anything to it