‹vÑKÿ/var/lib/mailman/archives/private/rabbitmq-discuss/

wget http://lists.rabbitmq.com/pipermail/rabbitmq-discuss/2011-May.txt.gz
gzip -d 2011-May.txt.gz

gzip -cd 2011-May.txt.gz | gzip -cd > 2011-May.txt

for file in *.gz; do mv $file $file.gz; done;
gunzip *.gz
gunzip *.gz