Ages ago I suggested a fix to the gcc bug tracking system that would work for everyone and avoid this stupid situation where everybody's bug tracking system has to include individual workarounds for every other bug tracking system: simply make your Bugzilla ignore mails it receives with the Precedence: header set to "bulk", "junk", or "list", and set "Precedence: bulk" on any automatically originated mails. debbugs has done this since shortly after this discussion last came up. Please can somebody implement this in Bugzilla?
I can do this, hopefully today or tomorrow.