Domain Overview
DNS: ✓ 2d ago
Checker: ✓ 2d ago
ac-systems.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-19 06:20:20 UTC · ↺ Refresh
MX Hostnames
- acsystems-com0e.mail.protection.outlook.com
MX Priorities
- acsystems-com0e.mail.protection.outlook.com: 0
A / AAAA Records
- 172.67.133.5 (no PTR)
- 104.21.5.58 (no PTR)
- 2606:4700:3032::ac43:8505
- 2606:4700:3035::6815:53a
Mail Server IPs
- 52.101.68.5 ↩ mail-du2pr03cu00105.inbound.protection.outlook.com
- 52.101.73.11 ↩ mail-am1pr04cu00103.inbound.protection.outlook.com
- 52.101.68.0 ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
- 52.101.73.8 ↩ mail-am0pr04cu00500.inbound.protection.outlook.com
- 2a01:111:f403:ca09::4 ↩ mail-am0pr04cu00504.inbound.protection.outlook.com
- 2a01:111:f403:ca04::5 ↩ mail-db3pr0202cu00205.inbound.protection.outlook.com
- 2a01:111:f403:ca09::9 ↩ mail-as8pr04cu00801.inbound.protection.outlook.com
- 2a01:111:f403:ca04:: ↩ mail-db3pr0202cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
abby.ns.cloudflare.com dns.cloudflare.com 2403996662 10000 2400 604800 1800
Primary NS (mname)
abby.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2403996662
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
george.ns.cloudflare.com
abby.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:amazonses.com include:_spf.getresponse.com include:144529916.spf05.hubspotemail.net -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; sp=quarantine; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
default._domainkey
mail._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
6 records- SPFv=spf1 include:spf.protection.outlook.com include:amazonses.com include:_spf.getresponse.com include:144529916.spf05.hubspotemail.net -all
- MS=ms81370744
- Sendinblue-code:e8a9b61d23e40c7fad9ebd55b9fe0520
- anthropic-domain-verification-4ah1tw=JKqV9vcwPBReBaceWE0Qzx6uq
- atlassian-domain-verification=tGKZTYYYJ/NCKP9KX6Dq1RUJGwie+xPPUMbe0I5xR+0F+NV3mbwGWH8owbYQ/LQZ
- google-site-verification=EzV4O5Ycuhi8sAUkl5lQix_QN5hGIc9hNcMBBmwHk8o
Full email verification for ac-systems.com
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