Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
centertech.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 18:57:12 UTC · ↺ Refresh
MX Hostnames
- mx-02-us-east-2.prod.hydra.sophos.com
- mx-01-us-east-2.prod.hydra.sophos.com
MX Priorities
- mx-01-us-east-2.prod.hydra.sophos.com: 10
- mx-02-us-east-2.prod.hydra.sophos.com: 20
A / AAAA Records
- 172.67.71.192 (no PTR)
- 104.26.9.246 (no PTR)
- 104.26.8.246 (no PTR)
- 2606:4700:20::681a:8f6 (no PTR)
- 2606:4700:20::ac43:47c0 (no PTR)
- 2606:4700:20::681a:9f6 (no PTR)
Mail Server IPs
- 3.135.48.136 ↩ ec2-3-135-48-136.us-east-2.compute.amazonaws.com
- 18.189.107.171 ↩ ec2-18-189-107-171.us-east-2.compute.amazonaws.com
- 18.118.219.4 ↩ ec2-18-118-219-4.us-east-2.compute.amazonaws.com
SOA Record
Raw SOA
colette.ns.cloudflare.com dns.cloudflare.com 2399437145 10000 2400 604800 1800
Primary NS (mname)
colette.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399437145
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
rene.ns.cloudflare.com
colette.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:spf.protection.outlook.com include:spf.mandrillapp.com include:relay.mailchannels.net include:spf1.atera.com include:_spf_useast2.prod.hydra.sophos.com ip4:199.255.192.0/22 ip4:199.127.232.0/22 ip4:54.240.0.0/18 ip4:69.169.224.0/20 ip4:23.249.208.0/20 ip4:23.251.224.0/19 ip4:76.223.176.0/20 ip4:54.240.64.0/18 ip4:76.223.128.0/19 ip4:216.221.160.0/19 ip4:206.55.144.0/20 ip4:24.110.64.0/18 ~all
📊 DNS lookups: 5/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected]; aspf=s; adkim=s
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected],mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
8 records- google-site-verification=kvzyh0LeqrKklnmpWeDQBY2C_XUwz0UivcYoq-eUiAw
- openai-domain-verification=dv-xTdhPk2iKm0wC1WJceCdClNj
- sophos-domain-verification=a1dbf2b963e96053cfedb864ef421c479ff93b7c0e52be1e5472ec859d7cc391
- SPFv=spf1 include:spf.protection.outlook.com include:spf.mandrillapp.com include:relay.mailchannels.net include:spf1.atera.com include:_spf_useast2.prod.hydra.sophos.com ip4:199.255.192.0/22 ip4:199.127.232.0/22 ip4:54.240.0.0/18 ip4:69.169.224.0/20 ip4:23.249.208.0/20 ip4:23.251.224.0/19 ip4:76.223.176.0/20 ip4:54.240.64.0/18 ip4:76.223.128.0/19 ip4:216.221.160.0/19 ip4:206.55.144.0/20 ip4:24.110.64.0/18 ~all
- MS=ms84648428
- amazon-business-verification=e37d7d3bbd66d4016cb6258374b04d3c6314790e2e427157c2b9c75c257d2c82
- apple-domain-verification=oU9v9UpvqwQpSRTM
- google-site-verification=2LdvCszEYDDS7YnjxRpyM8H-qsmCUuSZwB2ys4-A0eM
Full email verification for centertech.com
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