4 / 10
Lookups
0
Issues
458,791
IPv4 addresses
2.19 ⋅ 10
24
IPv6 addresses
v=spf1 include:spf.protection.outlook.com ip4:45.91.28.12 ip4:45.91.28.21 include:_spf.uvt.cz -all
Copied
Terms
include:
spf.protection.outlook.com
Evaluate this SPF record and
pass
if it
passes.
This include does nothing if the included record returns fail, soft fail, or neutral.
Microsoft 365 / Outlook
Inbox software
or else
ip4:
45.91.28.12 / 32
pass
if the sender's IP is between
45.91.28.12 and 45.91.28.12 (inclusive).
45.91.28.12 and 45.91.28.12 (inclusive).
UVT Internet s.r.o.
AS35236
or else
ip4:
45.91.28.21 / 32
pass
if the sender's IP is between
45.91.28.21 and 45.91.28.21 (inclusive).
45.91.28.21 and 45.91.28.21 (inclusive).
UVT Internet s.r.o.
AS35236
or else
include:
_spf.uvt.cz
Evaluate this SPF record and
pass
if it
passes.
This include does nothing if the included record returns fail, soft fail, or neutral.
or else
-all
fail
the email's SPF check.
Included records
v=spf1 include:spf.protection.outlook.com ip4:45.91.28.12 ip4:45.91.28.21 include:_spf.uvt.cz -all
6 x ip4 5 x ip6 -all
4 x ip4 4 x ip6 include:_mailer.uvtnet.cz -all
1 x ip4 1 x ip6 include:_spf.cmail.uvtnet.cz -all
1 x ip4 1 x ip6 -all
IP ranges
2a01:111:f403:8000::
/ 51
Microsoft
AS8075
2a01:111:f403:8000::
2a01:111:f403:9fff:ffff:ffff:ffff:ffff
2a01:111:f403:c000::
/ 51
Microsoft
AS8075
2a01:111:f403:c000::
2a01:111:f403:dfff:ffff:ffff:ffff:ffff
2a01:111:f403:f000::
/ 52
Microsoft
AS8075
2a01:111:f403:f000::
2a01:111:f403:ffff:ffff:ffff:ffff:ffff
2a00:1238:2:310::
/ 64
UVT Internet s.r.o.
AS35236
2a00:1238:2:310::
2a00:1238:2:310:ffff:ffff:ffff:ffff
2a00:1238:2:311::
/ 64
UVT Internet s.r.o.
AS35236
2a00:1238:2:311::
2a00:1238:2:311:ffff:ffff:ffff:ffff
2a00:1238:2:312::
/ 64
UVT Internet s.r.o.
AS35236
2a00:1238:2:312::
2a00:1238:2:312:ffff:ffff:ffff:ffff