Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
sertwork.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-02 10:25:11 UTC · ↺ Refresh
MX Hostnames
- sertwork-com.mail.protection.outlook.com
MX Priorities
- sertwork-com.mail.protection.outlook.com: 0
A / AAAA Records
- 3.33.152.147 ↩ a4ec4c6ea1c92e2e6.awsglobalaccelerator.com
- 15.197.142.173 ↩ a4ec4c6ea1c92e2e6.awsglobalaccelerator.com
Mail Server IPs
- 52.101.99.0 ↩ mail-cwxp265cu00600.inbound.protection.outlook.com
- 52.101.89.2 ↩ mail-lo3p265cu00302.inbound.protection.outlook.com
- 52.101.99.2 ↩ mail-cwxp265cu00502.inbound.protection.outlook.com
- 52.101.89.1 ↩ mail-lo0p265cu00201.inbound.protection.outlook.com
- 2a01:111:f403:ca0b:: ↩ mail-lo2p265cu02300.inbound.protection.outlook.com
- 2a01:111:f403:ca0b::1 ↩ mail-lo3p265cu00301.inbound.protection.outlook.com
- 2a01:111:f403:ca1a:: ↩ mail-cwxp265cu00500.inbound.protection.outlook.com
- 2a01:111:f403:ca0b::2 ↩ mail-lo0p265cu00202.inbound.protection.outlook.com
SOA Record
Raw SOA
curt.ns.cloudflare.com dns.cloudflare.com 2396900238 10000 2400 604800 1800
Primary NS (mname)
curt.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2396900238
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
curt.ns.cloudflare.com
natasha.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:46.4.4.9 ip4:109.233.50.76 include:spf.protection.outlook.com include:servers.mcsv.net include:_spf.bullhornmail.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject;
✓ Reject — strongest protection
📋 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
3 records- MS=ms34785912
- brevo-code:edbbeb13d9ccf60e34ecdc6827c54e2c
- SPFv=spf1 ip4:46.4.4.9 ip4:109.233.50.76 include:spf.protection.outlook.com include:servers.mcsv.net include:_spf.bullhornmail.com -all
Full email verification for sertwork.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits