Hello, we would need to see the message structure to determine what's going on. If the message doesn't contain any personal information and you are allowed to shared it with us, that would be the easiest option - just mail it to firstname.lastname@example.org (in a ZIP file to prevent mail servers along the way from interfering in the message structure).
The analyzed message showed that the attachment is using
In such case, the file name is taken from uuencode header if it exists.
The analyzed message contains uuencode header and specified the
'encoder.buf' as a file name.
We are considering to add an option, which will enable to prefer file name from MIME headers instead of uuencode header.