Hi, it seems there's some DNS misconfiguration on a BLU server: ~$ host 216.235.254.231 231.254.235.216.in-addr.arpa domain name pointer minerva.blu.org. ~$ host minerva.blu.org Host minerva.blu.org not found: 3(NXDOMAIN) This is the hostname being used for mailing list SMTP deliveries. regards, Nuno -- https://aeminium.org/nuno/