uspsoig.gov/A: The server appears to support DNS cookies but did not return a COOKIE option. See RFC 7873, Sec. 5.2.3. (2a02:e980:4::1, 2a02:e980:5::1, 2a02:e980:6::1, UDP_-_EDNS0_4096_D_KN)
uspsoig.gov/MX: The server appears to support DNS cookies but did not return a COOKIE option. See RFC 7873, Sec. 5.2.3. (192.230.121.1, 192.230.122.1, 192.230.123.1, UDP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_512_D_KN)
uspsoig.gov/AAAA has warnings; select the "Denial of existence" DNSSEC option to see them.