This was fixed in Mailman 2.1.6 by tightening the test for non-ascii in email addresses. The exception can still occur if a non-ascii email address is somehow a list member. ** Changed in: mailman Status: Invalid => Fix Released -- You received this bug notification because you are a member of Mailman Coders, which is subscribed to GNU Mailman. https://bugs.launchpad.net/bugs/266062 Title: Non-Ascii character in e-mail address causes traceback To manage notifications about this bug go to: https://bugs.launchpad.net/mailman/+bug/266062/+subscriptions