# journalctl -xe
Feb 12 18:55:25 host.example.com mailman[5571]: postmap: fatal: inet_addr_local[getifaddrs]: getifaddrs: Address family not supported by protocol
Feb 12 18:55:25 host.example.com postfix/postmap[5571]: fatal: inet_addr_local[getifaddrs]: getifaddrs: Address family not supported by protocol
Feb 12 18:55:26 host.example.com mailman[5584]: postmap: fatal: inet_addr_local[getifaddrs]: getifaddrs: Address family not supported by protocol
Feb 12 18:55:26 host.example.com postfix/postmap[5584]: fatal: inet_addr_local[getifaddrs]: getifaddrs: Address family not supported by protocol
Feb 12 18:55:27 host.example.com mailman[5569]: Starting Mailman's master runner
Feb 12 18:55:27 host.example.com mailman[5569]: Generating MTA alias maps
Feb 12 18:55:27 host.example.com mailman[5569]: Traceback (most recent call last):
Feb 12 18:55:27 host.example.com mailman[5569]:   File "/usr/bin/mailman", line 33, in <module>
Feb 12 18:55:27 host.example.com mailman[5569]:     sys.exit(load_entry_point('mailman==3.3.2', 'console_scripts', 'mailman')())
Feb 12 18:55:27 host.example.com mailman[5569]:   File "/usr/lib/python3.9/site-packages/click/core.py", line 829, in __call__
Feb 12 18:55:27 host.example.com mailman[5569]:     return self.main(*args, **kwargs)
Feb 12 18:55:27 host.example.com mailman[5569]:   File "/usr/lib/python3.9/site-packages/click/core.py", line 782, in main
Feb 12 18:55:27 host.example.com mailman[5569]:     rv = self.invoke(ctx)
Feb 12 18:55:27 host.example.com mailman[5569]:   File "/usr/lib/python3.9/site-packages/mailman/bin/mailman.py", line 68, in invoke
Feb 12 18:55:27 host.example.com mailman[5569]:     return super().invoke(ctx)
Feb 12 18:55:27 host.example.com mailman[5569]:   File "/usr/lib/python3.9/site-packages/click/core.py", line 1259, in invoke
Feb 12 18:55:27 host.example.com mailman[5569]:     return _process_result(sub_ctx.command.invoke(sub_ctx))
Feb 12 18:55:27 host.example.com mailman[5569]:   File "/usr/lib/python3.9/site-packages/click/core.py", line 1066, in invoke
Feb 12 18:55:27 host.example.com mailman[5569]:     return ctx.invoke(self.callback, **ctx.params)
Feb 12 18:55:27 host.example.com mailman[5569]:   File "/usr/lib/python3.9/site-packages/click/core.py", line 610, in invoke
Feb 12 18:55:27 host.example.com mailman[5569]:     return callback(*args, **kwargs)
Feb 12 18:55:27 host.example.com mailman[5569]:   File "/usr/lib/python3.9/site-packages/click/decorators.py", line 21, in new_func
Feb 12 18:55:27 host.example.com mailman[5569]:     return f(get_current_context(), *args, **kwargs)
Feb 12 18:55:27 host.example.com mailman[5569]:   File "/usr/lib/python3.9/site-packages/mailman/commands/cli_control.py", line 109, in start
Feb 12 18:55:27 host.example.com mailman[5569]:     call_name(config.mta.incoming).regenerate()
Feb 12 18:55:27 host.example.com mailman[5569]:   File "/usr/lib/python3.9/site-packages/mailman/mta/postfix.py", line 133, in regenerate
Feb 12 18:55:27 host.example.com mailman[5569]:     raise RuntimeError(NL.join(errors))
Feb 12 18:55:27 host.example.com mailman[5569]: RuntimeError: command failure: /usr/sbin/postmap /var/lib/mailman/data/postfix_lmtp, 1, Operation not permitted
Feb 12 18:55:27 host.example.com mailman[5569]: command failure: /usr/sbin/postmap /var/lib/mailman/data/postfix_domains, 1, Operation not permitted
Feb 12 18:55:27 host.example.com systemd[1]: mailman3.service: Control process exited, code=exited, status=1/FAILURE
░░ Subject: Unit process exited
░░ Defined-By: systemd
░░ Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
░░
░░ An ExecStart= process belonging to unit mailman3.service has exited.
░░
░░ The process' exit code is 'exited' and its exit status is 1.
Feb 12 18:55:27 host.example.com audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=mailman3 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=failed'
Feb 12 18:55:27 host.example.com systemd[1]: mailman3.service: Failed with result 'exit-code'.
░░ Subject: Unit failed
░░ Defined-By: systemd
░░ Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
░░
░░ The unit mailman3.service has entered the 'failed' state with result 'exit-code'.
Feb 12 18:55:27 host.example.com systemd[1]: Failed to start GNU Mailing List Manager.
░░ Subject: A start job for unit mailman3.service has failed
░░ Defined-By: systemd
░░ Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
░░
░░ A start job for unit mailman3.service has finished with a failure.
░░
░░ The job identifier is 3742 and the job result is failed.
Feb 12 18:55:27 host.example.com kernel: kauditd_printk_skb: 2 callbacks suppressed
Feb 12 18:55:27 host.example.com kernel: audit: type=1130 audit(1613156127.459:837): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=mailman3 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=failed'