Spurious emails from somewhere in "Debian hierarchy"

[Richard Owlett]

Since the beginning of February I've been receiving what I consider 
spurious emails.

I've set up a filter to send them to a separate sub-directory.
The filter detects either of 2 conditions:
  From,To,Cc or Bcc     Contains        bugs.debian.org
                        *OR*
  To                    Contains        www-master.debian.org

The only change to my setup {to best of my memory} was subscribing to 
the "debian-...@lists.debian.org" mailing list.

Where/how do I report this?
TIA