Sending e-mails to my own gmail account from a server without a domain name. When using internal hostname basinsrv.localdomain, cannot reply.Tried these non-default settings in main.cf:myorigin = 1.2.3.4mydestination=$myhostname, localhost.$mydomain, localhost, $myoriginresolve_numeric_domain = yesinet_protocols = ipv4inet_interfaces = allCan now reply from gmail, but postfix won't accept the reply:Sep 30 11:25:55 basinsrv postfix/smtpd[11639]: NOQUEUE: reject: RCPT from mail-la0-f66.google.com[209.85.215.66]: 550 5.1.1 <root@1.2.3.4>: Recipient address rejected: User unknown in local recipient table; from=<blahblah at gmail.com> to=<root@1.2.3.4> proto=ESMTP helo=<mail-la0-f66.google.com>According to https://en.wikipedia.org/wiki/Email_address , the ip address should be in brackets: root@[1.2.3.4]Changed:myorigin = [1.2.3.4]But now cannot reply, gmail says:Delivery to the following recipient failed permanently:     root@[1.2.3.4]Technical details of permanent failure: Internal parse error: Illegal envelope To: address (invalid domain name): root@[1.2.3.4]
gmail Internal parse error: Illegal envelope To: address (invalid domain name): root@[1.2.3.4]
centos;postfix