I’m one of those folks still using metalab.unc.edu for my e-mail. I noticed just now that I’m not getting any incoming mail.
So far, using DNS dig, I suspect that the likely authoritative nameserver for it, ns1.int.ibiblio.org, appears to be down, and so the secondaries, ns.unc.edu and ns2.edu, have expired their cache of the zone and are not returning results, such as an A result for www.metalab.unc.edu or an MX result for metalab.unc.edu.
I note ibiblio.org is working fine; I assume the DNS arrangements for that are different than metalab.unc.edu.
Is there a chance someone could fix this problem with the nameserver, or am I going to have to finally switch my e-mail to ibiblio.org?