Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rrexpress.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-25 18:24:15 UTC · ↺ Refresh
MX Hostnames
- rrexpress-com.mail.protection.outlook.com
MX Priorities
- rrexpress-com.mail.protection.outlook.com: 0
A / AAAA Records
- 34.102.169.19 ↩ 19.169.102.34.bc.googleusercontent.com
Mail Server IPs
- 52.101.10.12 ↩ mail-bn1pr21cu00204.inbound.protection.outlook.com
- 52.101.40.24 ↩ mail-cy5pr05cu00100.inbound.protection.outlook.com
- 52.101.194.19 ↩ mail-ch5pr02cu00303.inbound.protection.outlook.com
- 52.101.194.17 ↩ mail-ch5pr02cu00401.inbound.protection.outlook.com
- 2a01:111:f403:f804::3 ↩ mail-co1pr03cu00403.inbound.protection.outlook.com
- 2a01:111:f403:c927::1 ↩ mail-bn8pr05cu00301.inbound.protection.outlook.com
- 2a01:111:f403:c936:: ↩ mail-cy1pr05cu00400.inbound.protection.outlook.com
- 2a01:111:f403:f802::2 ↩ mail-sj2pr05cu00202.inbound.protection.outlook.com
SOA Record
Raw SOA
ns17.worldnic.com namehost.worldnic.com 126032316 10800 3600 604800 3600
Primary NS (mname)
ns17.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
126032316
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns17.worldnic.com
ns18.worldnic.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:spf.protection.outlook.com include:spf-us.emailsignatures365.com include:servers.mcsv.net include:spf.constantcontact.com -all include:_spf.psm.knowbe4.com
📊 DNS lookups: 5/10
DMARC Record
✗ p=none
v=DMARC1; p=none
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 1 found
k1._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: k1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
7 records- mj8e5g02p7ato41qksocjic378
- SPFv=spf1 include:spf.protection.outlook.com include:spf-us.emailsignatures365.com include:servers.mcsv.net include:spf.constantcontact.com -all include:_spf.psm.knowbe4.com
- 7VSYN2R6WJ25K4E7ZMD287F4M9NSZIJG34F998WJ
- 9hm654mhdm5d58pqqnl4i27gav
- 4vkaqd6bs5uifh45pv844ebqg1
- google-site-verification=NncSV6bQOTN1fQE7Z1vyKA5Zxwxab7utYjmEtAYKlkg
- 8rr93hhe1d2t80dsvlc4hkaj03
Full email verification for rrexpress.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits