udel.edu has no AAAA records.
Apex domains cannot have CNAME records.
Apple
Domain verification
apple-domain-verification=5n78usXJfZ0vgTey
Atlassian
Domain verification
atlassian-domain-verification=kG5tMbcO4mksxqW6e8BuXdMh5ZfICECWRBFNGQYAp9BJNVUWHy71TMrvSPLHanM9
Atlassian
Domain verification
atlassian-sending-domain-verification=41dba828-b297-4b7c-bafe-a2ccf4d25f2b
Microsoft
Domain verification
MS=ms22927527
Pardot
Domain verification
pardot1080123=37ec00bb9c8c1b3c5165ed96c9e2a52482eef50ee2518a4d9523f82b32ecc241
iCAuIRbjTdvds2zAtzMRfrlOF/PjOQmGhPXSNyhAd0Tqum3hGk8R9kXUAJqvsHTlLujXmlAtKC2b/KqaeCqNwg==
sending_domain1080123=dcdd9207f11fd0a6c2ef603dc43fa59e33707821671c9616c6587b550d1f40cc
URu4AGWOcDvKe4PwSDHvdS762TlVseaVc+du0jd4Gv3vIq0YI3VUuJ/6eTiiAxqSEfU4P7imWQeO7jWKqboZ/g==
Zone apex
Start of authority
Email
Serial
100867
Refresh
1d
Retry
4h
Expire
7d
Negative cache TTL
10m