The same behaviour observed with 2.1.12. Any idea whether Mailman 3 fixes this issue? -- You received this bug notification because you are a member of Mailman Coders, which is subscribed to GNU Mailman. https://bugs.launchpad.net/bugs/266166 Title: Broken PGP/MIME signature of messages with attachments To manage notifications about this bug go to: https://bugs.launchpad.net/mailman/+bug/266166/+subscriptions