Getting parts of the message as attachments when the sender uses Apple Mail

When I receive message composed with Apple Mail parts of the message are shown as HTML attachments rather then within the message body.
Is there any tweak that can solve this?
Mozilla Thunderbird works fine for this, but I prefer to continue with eM Client is possible.

Hello Marian,
unfortunately this is a known issue with Apple’s formatting and since some of our text formatting/loading is based on IE core which cannot intercept it any better we cannot change it, especially not for the current version.
We’re sorry for the inconvenience.

Best regards,