Mark Sapiro writes:
On 10/30/2014 08:00 AM, James Nightly wrote:
These messages are all HTML MIME-structured with multipart/mixed. Its a global issue, not a single iPhone/email/user -- its everyone with an iPhone, they can't read our newsletter. Images do not load. I tried using Gmail app and it seems to work! iPhone Mail app does not load images in the same message/account/phone/network.
Yes, that's a well-known issue and as Mark says it's purely an Apple Mail app issue, and there's nothing we can do about it on Mailman side. As you noticed the setting of dmarc_moderation_action doesn't matter.
There is something you can that may appease Apple's Mail app, and that is to turn off *all* Mailman trimmings for *all* recipients. That means that you cannot have a footer or header (the text fields must be *empty*, if they contain even whitespace MIME structure will be added), and you cannot have a subject tag (like [Mailman-Users] in the version of this message you get via the list) or post serial number.
Unfortunately there's no way to do this *only* for Apple Mail app users (these are listwide settings, not per-user settings), and it's pretty draconian. I can't even promise it will work (that depends on the posting MUA as well as on Apple Mail app), but it's an option that you can decide whether you want to try.
Good luck!
Steve