Mime/base64 format problem

Hi

I have problem with a message having wrong format and attached file is in base64 format.

"This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible."

It is a message with a small textfile.

If I look in Message Audit log I found the message without attachment. See attached image.

Does this mean that SMG is receiving the message without attachment and the error is on the sender side?

SMG version: 10.6.0-5

//Peter