Can you read this email? (second attempt)

[Kevin Godby]

Alberto's email got forwarded to the list admins with the following
message at the top:

——
The attached message matched the ubuntu-doc mailing list's content
filtering rules and was prevented from being forwarded on to the list
membership.  You are receiving the only remaining copy of the
discarded message.
——

So it looks like that filter is what was being triggered.

Alberto's message has a content-type of multipart/signed.

The mailing list filters out all messages except those with the
following content types:

 • multipart/mixed
 • multipart/alternative
 • text/plain

Since multipart/signed isn't explicitly allowed, messages of that type
were being deleted without notice.

I've added multipart/signed to the list of acceptable message types so
they should come through okay in the future.  I will also leave this
setting to notify admins of filtered messages instead of discarding
them silently.

Alberto, if you'd like to try to send another signed test message,
we'll see if it goes through okay. Thanks for helping us troubleshoot
this!

—Kevin