Dear Maintainer, I have fixed my issue. I finally realised this morning all my tests that the LMTP runner was running were on IPv4, and sure enough
telnet ::1 8024 showed “Connection refused” There are no firewall rules that seem to be relevant, so I guess mailman3 is not reachable on IPv6 maybe but I haven’t investigated further. In the meantime I have changed the transport for exim4 to be as follows: # /etc/exim4/conf.d/transport/55_mm3_transport mailman3_transport: driver = smtp protocol = lmtp allow_localhost # hosts = localhost # There seems to be a problem with the host being used in ipv6? Let's try this hosts = 127.0.0.1 port = MM3_LMTP_PORT rcpt_include_affixes = true Should it be working over IPv6? And if not, is this worth adding to README.Debian? Many thanks for your work and apologies for the issue! Kind regards, CT.
