On 03/09/2015 02:40 PM, Sebastian Nielsen wrote: > What causes this? See the attached EML file. The mail is duplicated > (with duplicate MIME headers) into a attached file, when Djigzo > validates the mail. What can cause such a “mishap”? > > This does only happen with lists.djigzo.com
The reason for this is a bit technical. The message sent by Andreas was S/MIME digitally signed. Since the mailing list server (mailman) needs to add a banner to the message, it needs to modify the message. The authors of mailman decided to create a new multipart/mixed part, add the signed message as a sub-part and then added the banner. The problem now is that the resulting message is no longer a valid S/MIME message. The CipherMail gateway however can detect this situation and "repair" the message to be a valid S/MIME message. It does this by detecting that a part is S/MIME. This part is then converted into an attached message (hence the attached message.eml name). This attached message is a valid S/MIME message which can be validated with your email client. The main reason for adding this is that there are a lot of "add banner to outgoing email" services which mess-up S/MIME email because those services do not understand S/MIME. Kind regards, Martijn Brinkers -- CipherMail email encryption Open source email encryption gateway with support for S/MIME, OpenPGP and PDF messaging. http://www.ciphermail.com Twitter: http://twitter.com/CipherMail _______________________________________________ Users mailing list [email protected] https://lists.djigzo.com/lists/listinfo/users
