Am 29.11.18 um 09:09 schrieb Francesc Peñalvez: > it may be a silly question but.Which option is appropriate to reject > emails from ip without ip resolved > Hi,
you could look for reject_unknown_client_hostname and/or reject_unknown_reverse_client_hostname under smtpd_client_restrictions (http://www.postfix.org/postconf.5.html#smtpd_client_restrictions) Willi
