You have edited this template and broken it. The default English language subscribeack.txt (welcome message) template does not contain Welcome to the %(description)s mailing list! %(welcome)s and the code that uses this template does not have a substitution for 'description'. The corresponding text in the default template is Welcome to the %(real_name)s@%(host_name)s mailing list! %(welcome)s ** Changed in: mailman Status: New => Invalid -- You received this bug notification because you are a member of Mailman Coders, which is subscribed to GNU Mailman. https://bugs.launchpad.net/bugs/1872840 Title: (description)s variable not substituted in emails To manage notifications about this bug go to: https://bugs.launchpad.net/mailman/+bug/1872840/+subscriptions