> -----Original Message----- > From: CentOS [mailto:centos-bounces at centos.org] On Behalf Of Pete Biggs > Sent: Saturday, August 25, 2018 8:00 AM > To: centos at centos.org > Subject: Re: [CentOS] Mail has quit working > > > > > > > > > > Can you reach localhost by "normal" means? > > > > > telnet localhost 25 > > > > > > > > I cannot. > > > > > > > > > Can you share the specific output of the command? It might help. From > > > what you've told us, localhost resolves to the IPv6 local address, and > > > that address is present on your "lo" device. You *should* be able to > > > connect. The type of error might indicate what is still wrong with the > > > system. > > > > > > > Trying 71.28.79... > > telnet: connect to address 184.108.40.206: Connection timed out > > > > So are you saying that if you do 'telnet localhost 25' it actually > tries to connect to '220.127.116.11'? > Yes > If so, then that seems to indicate that host lookups are still being > done primarily through DNS and it isn't looking in your /etc/hosts > file. > > What happens if you do > > telnet 127.0.0.1 25 > It connects to Postfix > what about > > telnet ::1 25 > It connects to Postfix also. Thanks!