Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
oist.jp
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-21 05:54:21 UTC · ↺ Refresh
MX Hostnames
- oist-jp.mail.protection.outlook.com
MX Priorities
- oist-jp.mail.protection.outlook.com: 0
A / AAAA Records
- 23.185.0.2 (no PTR)
- 2620:12a:8001::2 (no PTR)
- 2620:12a:8000::2
Mail Server IPs
- 52.101.157.40 ↩ mail-os9p286cu00100.inbound.protection.outlook.com
- 52.101.124.6 ↩ mail-tyvp286cu00206.inbound.protection.outlook.com
- 52.101.157.11 ↩ mail-os0p286cu01203.inbound.protection.outlook.com
- 52.101.124.1 ↩ mail-ty3p286cu00101.inbound.protection.outlook.com
- 2a01:111:f403:cc1a:: ↩ mail-tycp286cu02600.inbound.protection.outlook.com
- 2a01:111:f403:cc1f::1 ↩ mail-os0p286cu01201.inbound.protection.outlook.com
- 2a01:111:f403:cc1f:: ↩ mail-os9p286cu00100.inbound.protection.outlook.com
- 2a01:111:f403:cc1a::3 ↩ mail-tyvp286cu00203.inbound.protection.outlook.com
SOA Record
Raw SOA
extdnsc0.oist.jp root.extdnsc0.oist.jp 2026022630 10800 3600 360000 1200
Primary NS (mname)
extdnsc0.oist.jp
Admin Email (rname)
root@extdnsc0.oist.jp
Serial
2026022630
Refresh
10800s
Retry
3600s
Expire
360000s
Minimum TTL
1200s
Nameservers (NS)
extdnsc0.oist.jp
dns-x.sinet.ad.jp
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:203.181.243.3 ip4:203.181.243.17 ip4:203.181.243.77 ip4:203.181.243.165 ip4:163.43.136.149 ip4:153.125.144.148 include:spf.protection.outlook.com include:spf.securemx.jp include:spf.worksap.co.jp include:nii.ac.jp include:spf.gigacc.com ~all
📊 DNS lookups: 5/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1; pct=100; adkim=r; aspf=r
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 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- SPFv=spf1 ip4:203.181.243.3 ip4:203.181.243.17 ip4:203.181.243.77 ip4:203.181.243.165 ip4:163.43.136.149 ip4:153.125.144.148 include:spf.protection.outlook.com include:spf.securemx.jp include:spf.worksap.co.jp include:nii.ac.jp include:spf.gigacc.com ~all
- google-site-verification=BTjdr5jE0jOWBlJPPm197BQWNtMpfrlGy9WQ3hgxmz8
- _pzgt17chb6asswljk15kxgjq3286j8h
- 493C82B3CA823F029FD6E1B8E4D730AF
- asv=2b5dcbf1a5843757a600e26928d8a45c
- docusign=ca915af8-369d-409c-8e23-c27244c02cf9
- sr5wk5zDTGxjPUai1YHPL8VrGkCOmt6t1OvFc/p6TS84ns5IKiRsPKW/whMcQs86Y+43ByJIhsKBKl7ddHP9MQ==
- docusign=7207daa3-7492-4946-9a53-8890962e101a
Full email verification for oist.jp
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits