On Sun, Jul 10, 2022 at 10:57:40PM +0100, Gareth Evans wrote: > $ sudo reboot > - set boot arg ipv6.disable=1 > - NB ipv6 addresses still in /etc/hosts > > $ telnet localhost 25 > Trying 127.0.0.1... > Trying ::1... > telnet: Unable to connect to remote host: Address family not supported by > protocol > > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > $ sudo ss -lnt | grep :25 > $
> Does exim4 require ipv6? Check its log file to be sure. The snippet you posted earlier seems to say that it really does want to bind to loopback on both IPv4 and IPv6. Letting it do so seems like the path of least resistance.
