Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
jtexpress.mx
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-29 12:23:30 UTC · ↺ Refresh
MX Hostnames
- mx1.feishu.cn
- mx2.feishu.cn
- mx3.feishu.cn
MX Priorities
- mx2.feishu.cn: 5
- mx3.feishu.cn: 10
- mx1.feishu.cn: 1
A / AAAA Records
- 13.32.241.57 ↩ server-13-32-241-57.jfk50.r.cloudfront.net
- 13.32.241.30 ↩ server-13-32-241-30.jfk50.r.cloudfront.net
- 13.32.241.19 ↩ server-13-32-241-19.jfk50.r.cloudfront.net
- 13.32.241.12 ↩ server-13-32-241-12.jfk50.r.cloudfront.net
CNAME → d45r860583azy.cloudfront.net
Mail Server IPs
- 122.14.229.0 (no PTR)
- 101.126.58.225 (no PTR)
- 52.220.106.220 ↩ ec2-52-220-106-220.ap-southeast-1.compute.amazonaws.com
SOA Record
Raw SOA
ns-234.awsdns-29.com awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-234.awsdns-29.com
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-1234.awsdns-26.org
ns-1936.awsdns-50.co.uk
ns-234.awsdns-29.com
ns-1021.awsdns-63.net
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
6 records- globalsign-domain-verification=sMSOvr2eITBr1Khjf8FLGIZdklbGP56_tSoFk3djL7
- globalsign-domain-verification=cL7Lhv-22n6W3yebbk8VwTQWS2xNfdwR8rmer2jg_k
- verification-code-site-App_feishu=tegy2LiJox8okz6AIEx7
- globalsign-domain-verification=aFD88_vGuOtTjmYES1sNMVzQjnWjITcbEhbksY_DJE
- globalsign-domain-verification=pRmWR_FY_pLCeYb-MwlNkCJwTXZVmCegjw4WO3WVLn
- SPFv=spf1 +include:_netblocks.m.feishu.cn -all
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