Possibly the message does not have a text/html part. Have you tried the following in pass_mime_types: multipart text/html text/plain The fact that the Content-Type: header is not folded with a CR and whitespace following the semicolon is not an issue. If adding text/plain to pass_mime_types doesn't fix this, please post a complete raw message. You can elide the actual MIME part contents, but we need to see all the Content-Type: headers and part boundaries. ** Changed in: mailman Status: New => Incomplete ** 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/1787690 Title: Mailman rejects multipart content from Gmail/android To manage notifications about this bug go to: https://bugs.launchpad.net/mailman/+bug/1787690/+subscriptions