Colin Turner wrote: >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.
The LMTP runner listens on 127.0.0.1:8024 by default however this can be changed in the mailman.cfg https://docs.mailman3.org/projects/mailman/en/latest/src/mailman/config/docs/config.html However, I think the issue you ran into was Exim specific and not related to Mailman LMTP runner listening on ::1. I had a similar issue when upgrading to Bullseye and on the old host Mailman LMTP runner was still only listening on 127.0.0.1:8024. Based on this doc: https://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_dnslookup_router.html I made a slightly different edit to the transport: mailman_transport: debug_print = "Email for mailman" driver = smtp protocol = lmtp allow_localhost gethostbyname hosts = localhost port = 8024 rcpt_include_affixes = true I never tried to make Mailman LMTP listen on IPV6. Thanks. Andrew.
