Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
yc.edu
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-26 05:37:24 UTC · ↺ Refresh
MX Hostnames
- d109790b.ess.barracudanetworks.com
- d109790a.ess.barracudanetworks.com
MX Priorities
- d109790a.ess.barracudanetworks.com: 5
- d109790b.ess.barracudanetworks.com: 10
A / AAAA Records
- 198.60.125.195 (no PTR)
Mail Server IPs
- 209.222.82.255 ↩ mail.ess.barracuda.com
- 209.222.82.253 ↩ mail.ess.barracuda.com
- 209.222.82.252 ↩ mail.ess.barracuda.com
SOA Record
Raw SOA
ns11.constellix.com dns.constellix.com 2015010346 43200 3600 1209600 180
Primary NS (mname)
ns11.constellix.com
Admin Email (rname)
dns@constellix.com
Serial
2015010346
Refresh
43200s
Retry
3600s
Expire
1209600s
Minimum TTL
180s
Nameservers (NS)
ns41.constellix.net
ns51.constellix.net
ns61.constellix.net
ns11.constellix.com
ns21.constellix.com
ns31.constellix.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:198.60.125.0/24 include:_spf.google.com include:spf.protection.outlook.com include:spf.ess.barracudanetworks.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=quarantine; rua=mailto:[email protected],mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected],mailto:[email protected],mailto:[email protected]; fo=0:1:d:s; pct=100
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected],mailto:[email protected]
↳ Subdomain policy: quarantine
DKIM Selectors
✓ 4 found
google._domainkey
selector1._domainkey
selector2._domainkey
default._domainkey
✓ Public key: 253 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
14 records- 5383a20056b710bbaee72eeae9f6fde4d82176d971fc94d6d9a9a743a3ede3c6
- apple-domain-verification=tJtgLRsFcIW6nSUg
- 605bbc29cf2776340fecc7d8059e17cfe147a2e378b7371c08b6a8657dded400
- MS=ms60667051
- amazonses:d2CRHD/muvfJH4xY+taZ0UKGW1ahcJK9jWTBdJbEvlo=
- adobe-idp-site-verification=11d05925-d463-4438-bbdd-ad9376f74743
- 3cd034aefa337d399fd8dfd135f59c7a
- 45lt4V67DNcGdDrCB2AoMI9Emec5RdeatVOfjfhLeYbjHixUXOmZPkOG2w/1WJpr8bsqVZhnZsRNKLHunNG3Bw==
- google-site-verification=wlbcv3VrTRwPNVv574Y6Xj1tAazlfJFb3XRnJ-DFC5g
- e2ma-verification=lg3cb
- _k2ins44rdusd9hdkkmdsms76dec8j3h
- asv=9bb8a42da43b67988c18fdef7cd7129c
- _proof-domain-verification=ae2a672c-aa06-4b61-80b7-c48d7f8f064f
- SPFv=spf1 ip4:198.60.125.0/24 include:_spf.google.com include:spf.protection.outlook.com include:spf.ess.barracudanetworks.com -all
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