It seems there was a spate of spam on the PEG list earlier this month, which led Thunderbird to start marking all (?) posts as spam. The last one I found in my Junk folder was:
Re: [PEG] An alternative to left recursion Bob _______________________________________________ PEG mailing list PEG@lists.csail.mit.edu https://lists.csail.mit.edu/mailman/listinfo/peg
