Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
arcmech.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-24 22:52:24 UTC · ↺ Refresh
MX Hostnames
- arcmech-com.mail.protection.outlook.com
MX Priorities
- arcmech-com.mail.protection.outlook.com: 0
A / AAAA Records
- 198.185.159.145 (no PTR)
- 198.49.23.144 (no PTR)
- 198.49.23.145
- 198.185.159.144
Mail Server IPs
- 52.101.11.17 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
- 52.101.41.4 ↩ mail-sj2pr05cu00204.inbound.protection.outlook.com
- 52.101.9.5 ↩ mail-mn2pr04cu00205.inbound.protection.outlook.com
- 40.93.192.4 ↩ mail-dm2pr04cu00404.inbound.protection.outlook.com
- 2a01:111:f403:c902::16 ↩ mail-byapr04cu00306.inbound.protection.outlook.com
- 2a01:111:f403:c927:: ↩ mail-bn6pr21cu00500.inbound.protection.outlook.com
- 2a01:111:f403:c902::7 ↩ mail-sj0pr02cu00107.inbound.protection.outlook.com
- 2a01:111:f403:c92c::1 ↩ mail-dm6pr03cu00401.inbound.protection.outlook.com
SOA Record
Raw SOA
dns1.p01.nsone.net hostmaster.nsone.net 1742841651 43200 7200 1209600 3600
Primary NS (mname)
dns1.p01.nsone.net
Admin Email (rname)
hostmaster@nsone.net
Serial
1742841651
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
dns3.p04.nsone.net
dns4.p04.nsone.net
ns01.squarespacedns.com
ns02.squarespacedns.com
ns03.squarespacedns.com
ns04.squarespacedns.com
dns1.p04.nsone.net
dns2.p04.nsone.net
SPF Record
✓ Strict (-all)
v=spf1 ip4:71.181.125.70 ip4:64.222.64.186 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
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
1 record- SPFv=spf1 ip4:71.181.125.70 ip4:64.222.64.186 include:spf.protection.outlook.com -all
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