> And what is the error in Mailman's error log.
GLOBAL_BAN_LIST = ['^[0-9a-z.]{6,}\+[0-9a-z]{4,}@gmail\.com$'] D'oh. My apologies. The error was not from the trailing '$' but from not having the quotes in place originally. All is now well (with the above). Thanks, Mark 2018/06/04 10:33:14 [error] 17956#17956: *4956 FastCGI sent in stderr: "[Mailman: low level unrecoverable exception]" while reading response header from upstream, client: 68.235.48.108, server: mailmanlists.sg, request: "GET /mailman/listinfo HTTP/1.1", upstream: "fastcgi://unix:///var/run/fcgiwrap.socket:", host: "www.mailmanlists.sg" ------------------------------------------------------ Mailman-Users mailing list Mailman-Users@python.org https://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy: http://wiki.list.org/x/QIA9 Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: https://mail.python.org/mailman/options/mailman-users/archive%40jab.org