Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
caltech.edu
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-24 04:37:05 UTC · ↺ Refresh
MX Hostnames
- mx1.caltech.iphmx.com
- mx2.caltech.iphmx.com
MX Priorities
- mx2.caltech.iphmx.com: 10
- mx1.caltech.iphmx.com: 10
A / AAAA Records
- 52.26.125.194 ↩ ec2-52-26-125-194.us-west-2.compute.amazonaws.com
Mail Server IPs
- 68.232.147.192 ↩ esa.caltech.iphmx.com
- 68.232.137.147 ↩ esa.caltech.iphmx.com
SOA Record
Raw SOA
ns0090.secondary.cloudflare.com hostmaster.caltech.edu 2022898039 10800 3600 2592000 900
Primary NS (mname)
ns0090.secondary.cloudflare.com
Admin Email (rname)
hostmaster@caltech.edu
Serial
2022898039
Refresh
10800s
Retry
3600s
Expire
2592000s
Minimum TTL
900s
Nameservers (NS)
ns0090.secondary.cloudflare.com
ns0239.secondary.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:131.215.0.0/16 ip4:134.4.0.0/16 ip4:192.100.16.0/24 ip4:198.129.208.0/23 ip4:208.69.128.0/22 ip4:199.188.184.0/22 ip4:198.202.125.128/25 ip4:74.122.104.0/22 ip4:72.10.184.102 ip4:72.10.184.103 include:spf.protection.outlook.com include:sendgrid.net include:mktomail.com include:spf.dynect.net include:cust-spf.cashnet.com include:amazonses.com include:_spf.createsend.com include:_spf01.mykronos.com include:_s0.caltech.edu ?all
📊 DNS lookups: 9/10
? Neutral (?all) — no enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected];
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 5 found
selector1._domainkey
selector2._domainkey
default._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
10 records- amazonses:CBaUu/J2wBFtHuO9isUzHAXTnIWcN5RyPUBvggu7SNE=
- amazonses:X9y0RbFXXvxu3ft83xg2e+YV++OUePTUSeCOdB3Chjg=
- apple-domain-verification=KD7b3wNXe76BHRAV
- iContact1389932
- SPFv=spf1 ip4:131.215.0.0/16 ip4:134.4.0.0/16 ip4:192.100.16.0/24 ip4:198.129.208.0/23 ip4:208.69.128.0/22 ip4:199.188.184.0/22 ip4:198.202.125.128/25 ip4:74.122.104.0/22 ip4:72.10.184.102 ip4:72.10.184.103 include:spf.protection.outlook.com include:sendgrid.net include:mktomail.com include:spf.dynect.net include:cust-spf.cashnet.com include:amazonses.com include:_spf.createsend.com include:_spf01.mykronos.com include:_s0.caltech.edu ?all
- 1password-site-verification=VRLN67QMNNEPXIIREL6TDZABF4
- MS=ms43712753
- Y84qDmmAIPozyUoBIRWmXsFltoU2Pl8b8WGKPlqgz+1t5Db4z9H5ngaaCTq3TTaOK+SCPYUsGVlGn0wUzXNdow==
- ZOOM_verify_a-Gb5-aqQgygEiKsnho63w
- adobe-idp-site-verification=1e150df049a820e49156727d1b84c48a1ae11f66f87ad76d2cf30cb9d378acb6
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