On 12/20/2016 3:17 AM, L.P.H. van Belle wrote: > > postfix/ [smtp/smtpd/postscreen] show [client-hostname or unknown] IP > > (*always unknown if A/PTR mismatches in client hostname OR helo > hostname)
Labeling a client as unknown has nothing to do with the helo name. See the description for reject_unknown_client_hostname for the conditions when a client is labeled unknown. http://www.postfix.org/postconf.5.html#reject_unknown_client_hostname Postfix mostly ignores the helo name. You should too. -- Noel Jones
