Results for _spf-b.microsoft.com

SPF MX
DMARC*
 		BIMI MTA-STS
DNSSEC
 Nameservers Tech Partners
1 ❌ microsoft.com
(p=reject) 		❌ ❌ ❌ ❌ ❌

2025-07-17 05:38:15 (via https://www.mckellar.co/?domain=_spf-b.microsoft.com)

Umbrella Rank: > 1,000,000

DNSTwister | Comments | SPF Guru

SPF record for _spf-b.microsoft.com
SPF Lookups = 1

"v=spf1 include:_spf-mdm.microsoft.com ip4:207.46.22.35 ip4:207.46.22.98/29 ip4:217.77.141.52 ip4:217.77.141.59 ip4:203.32.4.25 ip4:23.103.224.0/19 ip4:206.191.224.0/19 ip4:65.52.80.137/32 ~all"

✔️ SPF Record appears to be valid, within the limit of 10 [RFC7208] - currently at 1
1
include:_spf-mdm.microsoft.com
Lookup
2025-07-17 05:38:15 (via https://www.mckellar.co/?domain=_spf-b.microsoft.com) Top
17,423 IPv4 Addresses
0 IPv6 Addresses
17 subnets (and IP)


DMARC record for _spf-b.microsoft.com


Inherited from: microsoft.com
Vendor(s): microsoft.com
Policy: reject (100%)

✔️ Great work, You got there!
Your domain is secured and it is not possible for your domain to be spoofed.

Aggregate Recipients (1):
1Unknown (mailto:[email protected])

Forensic Recipients (1):
mailto:[email protected]

Failure Reporting Options(Recommended fo=1):
Generate a DMARC failure report if any underlying authentication mechanism (SPF or DKIM) produced something other than an aligned “pass” result. (fo=1)
"v=DMARC1; p=reject; pct=100; rua=mailto:[email protected];
ruf=mailto:[email protected]; fo=1"
2025-07-17 05:38:15 (via https://www.mckellar.co/?domain=_spf-b.microsoft.com) Top

BIMI record for _spf-b.microsoft.com

_spf-b.microsoft.com currently has no default BIMI record

Read all about BIMI
2025-07-17 05:38:15 (via https://www.mckellar.co/?domain=_spf-b.microsoft.com) Top


MX record for _spf-b.microsoft.com

VendorPreferenceMX Record
NoneN/ANone
2025-07-17 05:38:15 (via https://www.mckellar.co/?domain=_spf-b.microsoft.com) Top


MTA-STS record for _spf-b.microsoft.com

_spf-b.microsoft.com currently has no MTA-STS or TLS-RPT records

2025-07-17 05:38:15 (via https://www.mckellar.co/?domain=_spf-b.microsoft.com) Top


Force refresh on _spf-b.microsoft.com


your ip: 216.73.216.191


Public Suffix List version: 2025-06-02_07-53-42_UTC