3
records
IPv4 Addresses
TTL
insularum4.engr.wustl.edu. 1200 IN A 128.252.167.136
Mail Servers
TTL
MX
—
10
20m
insularum4.engr.wustl.edu. 1200 IN MX 10 mail.ensularum4.engr.wustl.edu.
SPF (Sender Policy Framework)
TTL
SPF
SPFv1
| Qualifier | Mechanism | Target / value | Valid | Details |
|---|
SPF warnings
- SPF recommends the literal version token v=spf1 (lowercase, per RFC 4408)
20m
insularum4.engr.wustl.edu. 1200 IN TXT "v=spf1aa:mail.insularum4.engr.wustl.edu-all"