Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
udacity.com
Yes
✓ Yes
Proofpoint
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-20 16:42:35 UTC · ↺ Refresh
MX Hostnames
- mxa-00593801.gslb.pphosted.com
- mxb-00593801.gslb.pphosted.com
MX Priorities
- mxa-00593801.gslb.pphosted.com: 10
- mxb-00593801.gslb.pphosted.com: 10
A / AAAA Records
- 18.238.80.36 ↩ server-18-238-80-36.jfk52.r.cloudfront.net
- 18.238.80.111 ↩ server-18-238-80-111.jfk52.r.cloudfront.net
- 18.238.80.107 ↩ server-18-238-80-107.jfk52.r.cloudfront.net
- 18.238.80.21 ↩ server-18-238-80-21.jfk52.r.cloudfront.net
Mail Server IPs
- 205.220.177.99 ↩ mx0b-00593801.pphosted.com
- 205.220.165.99 ↩ mx0a-00593801.pphosted.com
SOA Record
Raw SOA
ns-1549.awsdns-01.co.uk awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-1549.awsdns-01.co.uk
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-1109.awsdns-10.org
ns-13.awsdns-01.com
ns-1549.awsdns-01.co.uk
ns-1014.awsdns-62.net
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.google.com include:sendgrid.net include:mail.zendesk.com include:mktomail.com include:_spf.salesforce.com include:244199112.spf08.hubspotemail.net ip4:205.220.165.99 ip4:205.220.177.99 -all
📊 DNS lookups: 6/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;fo=1;rua=mailto:[email protected];ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 3 found
google._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
8 records- atlassian-domain-verification=mBjfUMIIMEpsVsE5wql1jKvzxVpCWKZwpnSWFbY51pnIrp5nSd+8xJn4GKhfHK7j
- atlassian-sending-domain-verification=4a498916-8f31-4a42-b4ec-758ee24b79e4
- cursor-domain-verification-7zn380=ChGiB1Fhp14asve0cCXYyhxFn
- facebook-domain-verification=q0sgl66mvrtj3ivlf1s98bn6gxvii2
- google-site-verification=FJqQiq8r-ExkN9kiVDy44SL2wkm6VS8zka0HUkunGME
- status-page-domain-verification=y08j3wqb2sw9
- SPFv=spf1 include:_spf.google.com include:sendgrid.net include:mail.zendesk.com include:mktomail.com include:_spf.salesforce.com include:244199112.spf08.hubspotemail.net ip4:205.220.165.99 ip4:205.220.177.99 -all
- apple-domain-verification=iaobRRgsJ5xUkcuj
Full email verification for udacity.com
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