The issue is with RFC 2047 encoded Subject: and the fact that white space is insignificant between RFC 2047 "encoded words". This fix adds a trailing space to the subject_prefix (from which it has been previously stripped) under what I think is just those circumstances where it is needed. There is another issue in that under some circumstances, the prefix will be followed by two spaces. This is unchanged by this fix and I have no plan to try to change it. I think this only occurs when the prefix is ascii only and the incoming Subject: already contains the prefix, but doesn't contain a Re: indicator. ** Changed in: mailman Importance: Undecided => Low ** Changed in: mailman Status: New => Fix Committed ** Changed in: mailman Milestone: None => 2.1.21 ** Changed in: mailman Assignee: (unassigned) => Mark Sapiro (msapiro) -- You received this bug notification because you are a member of Mailman Coders, which is subscribed to GNU Mailman. https://bugs.launchpad.net/bugs/1525954 Title: mailman-2.1.20: option "subject_prefix": prefix trailing blanks are removed when subject lines have non-ASCII characters To manage notifications about this bug go to: https://bugs.launchpad.net/mailman/+bug/1525954/+subscriptions