I see, http://trac-hacks.org/wiki/NeverNotifyUpdaterPlugin is something one must ask each trac maintainer to install, at each trac where we have reported bugs.
I will rather just filter the mail myself with my SpamAssassin stanza version 2: header __J_TRAC_COMMENT X-Trac-Ticket-URL =~/\#comment/ rawbody __J_TRAC_MY_COMMENT /\+-+\n(Changes|Comment) \(by jidanni\):\n/m meta J_TRAC_OTHERS __J_TRAC_COMMENT && ! __J_TRAC_MY_COMMENT score J_TRAC_OTHERS -7 Missing To: headers at the trac I used upped SpamAssassin's score so I didn't need up their threshold to filter. I hope one day vanilla Trac will offer more than all or none email choices.