Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
csu.edu
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-25 21:45:49 UTC · ↺ Refresh
MX Hostnames
- d226001a.ess.barracudanetworks.com
- d226001b.ess.barracudanetworks.com
MX Priorities
- d226001b.ess.barracudanetworks.com: 10
- d226001a.ess.barracudanetworks.com: 10
A / AAAA Records
- 34.236.193.193 ↩ ec2-34-236-193-193.compute-1.amazonaws.com
- 52.73.2.219 ↩ ec2-52-73-2-219.compute-1.amazonaws.com
- 3.209.26.193 ↩ ec2-3-209-26-193.compute-1.amazonaws.com
Mail Server IPs
- 209.222.82.253 ↩ mail.ess.barracuda.com
- 209.222.82.255 ↩ mail.ess.barracuda.com
- 209.222.82.252 ↩ mail.ess.barracuda.com
SOA Record
Raw SOA
cougar1.csu.edu postmaster.csu.edu 2026030301 7200 3600 1209600 60
Primary NS (mname)
cougar1.csu.edu
Admin Email (rname)
postmaster@csu.edu
Serial
2026030301
Refresh
7200s
Retry
3600s
Expire
1209600s
Minimum TTL
60s
Nameservers (NS)
ns1.illinois.net
cougar2.csu.edu
ns2.illinois.net
cougar1.csu.edu
SPF Record
✓ Strict (-all)
v=spf1 ip4:209.175.72.0/24 ip4:209.175.73.0/24 ip4:209.175.74.0/24 ip4:209.175.75.0/24 ip4:199.244.78.223/32 ip4:199.244.78.224/32 ip4:68.169.28.165/32 ip4:52.205.115.159/32 include:spf.ess.barracudanetworks.com include:_tuf-spf.touchnet.com include:_spf.google.com include:spf.protection.outlook.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict 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
google._domainkey
selector1._domainkey
selector2._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- MS=AB21236FA301F05A416C1ACFDE283130490316AD
- logmein-verification-code=5ffe457f-38e8-4142-b82c-b13552edc639
- google-site-verification=wYcYkOVb7YoFP_mhXVX48UAG3BWmOMajXHtamd2sifo
- google-site-verification=bkXlNecLjw0nW80kvVM2cZsdbg32qsANFIjp6t-yEug
- google-site-verification=euLVRu88ZWpAEk76hkwBtZbGfnN-v-3iyJkf7MrgO8c
- google-site-verification=OQIAb9066NHPww3Ppk557vdRhsPRSkPwtZDVO8b_Ezc
- apple-domain-verification=j4uT989liwIUQE1t
- SPFv=spf1 ip4:209.175.72.0/24 ip4:209.175.73.0/24 ip4:209.175.74.0/24 ip4:209.175.75.0/24 ip4:199.244.78.223/32 ip4:199.244.78.224/32 ip4:68.169.28.165/32 ip4:52.205.115.159/32 include:spf.ess.barracudanetworks.com include:_tuf-spf.touchnet.com include:_spf.google.com include:spf.protection.outlook.com -all
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