In 5.0.10 we added the feature to create local failures instead of displaying bad MIME. There are some cases where the Outlook MIME converter can't handle the input. See bug 30282 for background.
We then found that lots of local failure messages was somewhat annoying, so in 5.0.11, we fixed bug 32311. This will create just one local failure warning for these cases.
The underlying cause, though, is a third party issue. Outlook can't handle the MIME. |