Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rssinfrastructure.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-04 08:21:34 UTC · ↺ Refresh
MX Hostnames
- rssinfrastructure-com.mail.protection.outlook.com
MX Priorities
- rssinfrastructure-com.mail.protection.outlook.com: 0
A / AAAA Records
- 34.105.167.34 ↩ 34.167.105.34.bc.googleusercontent.com
Mail Server IPs
- 52.101.68.25 ↩ mail-db8pr02cu00101.inbound.protection.outlook.com
- 52.101.68.12 ↩ mail-db9pr02cu00204.inbound.protection.outlook.com
- 52.101.73.2 ↩ mail-as9pr07cu00302.inbound.protection.outlook.com
- 52.101.73.6 ↩ mail-am6pr04cu00306.inbound.protection.outlook.com
- 2a01:111:f403:ca04::6 ↩ mail-db4pr02cu00406.inbound.protection.outlook.com
- 2a01:111:f403:ca04::10 ↩ mail-dbapr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca09::4 ↩ mail-am0pr04cu00504.inbound.protection.outlook.com
- 2a01:111:f403:ca04::1 ↩ mail-db7pr03cu00401.inbound.protection.outlook.com
SOA Record
Raw SOA
ns.heartinternet.uk hostmaster.mainnameserver.com 2025111552 10800 600 2419200 3600
Primary NS (mname)
ns.heartinternet.uk
Admin Email (rname)
hostmaster@mainnameserver.com
Serial
2025111552
Refresh
10800s
Retry
600s
Expire
2419200s
Minimum TTL
3600s
Nameservers (NS)
ns2.heartinternet.uk
ns.heartinternet.uk
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:sendgrid.net ip4:51.140.37.132 ip4:51.141.5.228 include:soverin.net include:144167987.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]; ruf=mailto:[email protected]; fo=1; pct=100; aspf=r; adkim=r;
~ 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
s1._domainkey
s2._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
3 records- SPFv=spf1 include:spf.protection.outlook.com include:sendgrid.net ip4:51.140.37.132 ip4:51.141.5.228 include:soverin.net include:144167987.spf05.hubspotemail.net -all
- MS=ms22885525
- google-site-verification=Pnfm6R0ZlF8RaaKHTWSa6XoM21vbunXV5UvRlB5epbw
Full email verification for rssinfrastructure.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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