Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
jtexpress.com.br
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-30 05:29:28 UTC · ↺ Refresh
MX Hostnames
- mx2.feishu.cn
- mx3.feishu.cn
- mx1.feishu.cn
MX Priorities
- mx1.feishu.cn: 1
- mx2.feishu.cn: 5
- mx3.feishu.cn: 10
A / AAAA Records
- 99.84.160.100 ↩ server-99-84-160-100.jfk50.r.cloudfront.net
- 99.84.160.27 ↩ server-99-84-160-27.jfk50.r.cloudfront.net
- 99.84.160.34 ↩ server-99-84-160-34.jfk50.r.cloudfront.net
- 99.84.160.66 ↩ server-99-84-160-66.jfk50.r.cloudfront.net
CNAME → d2zz0s5s2wsy4h.cloudfront.net
Mail Server IPs
- 52.220.106.220 ↩ ec2-52-220-106-220.ap-southeast-1.compute.amazonaws.com
- 101.126.58.225 (no PTR)
- 122.14.229.0 (no PTR)
SOA Record
Raw SOA
ns-71.awsdns-08.com awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-71.awsdns-08.com
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-71.awsdns-08.com
ns-957.awsdns-55.net
ns-1523.awsdns-62.org
ns-1998.awsdns-57.co.uk
SPF Record
✓ Strict (-all)
v=spf1 +include:_netblocks.m.feishu.cn -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; fo=1; ruf=mailto:[email protected]; rua=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
8 records- globalsign-domain-verification=qqlo_uvn-E7iAWsAo_dQ9vNzxYNVxVpHtfK341gV7F
- facebook-domain-verification=4qojjns1b8kufflfzbs8iqustxhcrc
- google-site-verification=MPcUNe8pcx3xaXiYCEBI3SXdQfk1ZQEveArUEsUdzF0
- SPFv=spf1 +include:_netblocks.m.feishu.cn -all
- verification-code-site-App_feishu=JyQdfRkapGBrUHJr8ZAM
- MS=ms62974993
- _globalsign-domain-verification=lAw0efWIplEMnQARlk5Zocq9-JsodjuvVbFPtoq7c5
- globalsign-domain-verification=ChGvna5mRGDs8F0madoC1Uh0tGOzWf9EgTYGt1E7Uf
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