One of our third-party DNSBL services, SpamCop, allowed their domain to expire, presumably as a mistake, and began to return “listed” for all DNSBL checks. We use a DNSBL as an early rejection for spam emails, and this caused 21 incoming emails to be wrongfully rejected. We have removed SpamCop from our list of DNSBLs and filed a ticket to improve our monitoring so that we may catch this sooner. Incoming emails are working now, but be advised that if your postmaster uses SpamCop, emails f...
