Periodically, a number of servers will bounce back digests with this
message:


------- Failure Reasons  --------

MIME parse error: Multipart must specify boundary

------- Returned Message --------

I am guessing this is (somehow) triggered by attachments within the
original mail messages.  Is this the case or is it something else?  Our
current default for "digest" is "mime".  Thanks for any info, --Joe Kelley