"----boundary..." is a part of the attachment

[nnnicolay]

This was reproduced with the latest version 6.1.0

Describe the bug
The attachment is saved with the wrong name, without file extension, and with "----boundary..." inside

Code to Reproduce
To reproduce the problem please use this EML

fake.eml.zip

Screenshots
I assume that the problem could be caused by incorrect parts detection when we have a nested 'boundary'. This is what we can see inside the Attachment

Additional context
The attachment name and the content

Thank you

[nnnicolay]

Hello @Webklex, were you able to reproduce the problem?