sspu-opava.cz SPF record

11 / 10 Lookups
1 Issue
918,144 IPv4 addresses
4.38 ⋅ 10 24 IPv6 addresses

More than 10 DNS lookups were required to process this SPF record.

v=spf1 mx a ip4:213.155.227.112/28 include:skolaonline.cz include:spf.protection.outlook.com include:spf.skolaonline.cz -all Copied

Terms

mx
pass if the sender's IP address is in the A or AAAA record of this domain.
4 IPv4 addresses
4 IPv6 addresses
or else
a
pass if the sender's IP address is in the A or AAAA record of this domain.
1 IPv4 address
or else
ip4:
213.155.227.112 / 28
pass if the sender's IP is between
213.155.227.112 and 213.155.227.127 (inclusive).
NETBOX Autonomous system
AS31246
or else
include:
skolaonline.cz
Evaluate this SPF record and pass if it
passes.
or else
include:
spf.protection.outlook.com
Evaluate this SPF record and pass if it
passes.
Microsoft 365 / Outlook
Inbox software
or else
include:
spf.skolaonline.cz
Evaluate this SPF record and pass if it
passes.
or else
-all
fail the email's SPF check.

Included records

v=spf1 mx a ip4:213.155.227.112/28 include:skolaonline.cz include:spf.protection.outlook.com include:spf.skolaonline.cz -all
More than 10 DNS lookups were required to process this SPF record
2 x ip4 mx include:spf.protection.outlook.com include:spf.smartemailing.cz ~all
6 x ip4 5 x ip6 -all
11 x ip4 include:spf1.smartemailing.cz ~all
7 x ip4 3 x ip6 include:spf2.smartemailing.cz ~all
9 x ip4 include:spf3.smartemailing.cz ~all
6 x ip4 5 x ip6 -all
1 x ip4 ~all

IP ranges

52.101.73.15
Microsoft
AS8075
52.101.68.29
Microsoft
AS8075
52.101.68.27
Microsoft
AS8075
52.101.73.30
Microsoft
AS8075
2a01:111:f403:ca09::e
Microsoft
AS8075
2a01:111:f403:ca09::9
Microsoft
AS8075
2a01:111:f403:ca04::7
Microsoft
AS8075
2a01:111:f403:ca09::8
Microsoft
AS8075
213.155.227.115
NETBOX Autonomous system
AS31246
213.155.227.112 / 28
NETBOX Autonomous system
AS31246
217.16.183.28
VSHosting s.r.o.
AS43541
185.99.177.70
Vodafone Czech Republic a.s.
AS16019
52.101.73.24
Microsoft
AS8075
52.101.73.28
Microsoft
AS8075
52.101.68.21
Microsoft
AS8075
52.101.68.5
Microsoft
AS8075
2a01:111:f403:ca09::9
Microsoft
AS8075
2a01:111:f403:ca04::8
Microsoft
AS8075
2a01:111:f403:ca04::c
Microsoft
AS8075
2a01:111:f403:ca04::9
Microsoft
AS8075
40.92.0.0 / 15
Microsoft
AS8075
40.107.0.0 / 16
Microsoft
AS8075
52.100.0.0 / 15
Microsoft
AS8075
52.102.0.0 / 16
Microsoft
AS8075
52.103.0.0 / 17
Microsoft
AS8075
104.47.0.0 / 17
Microsoft
AS8075
2a01:111:f400:: / 48
Microsoft
AS8075
2a01:111:f403:: / 49
Microsoft
AS8075
2a01:111:f403:8000:: / 51
Microsoft
AS8075
2a01:111:f403:c000:: / 51
Microsoft
AS8075
2a01:111:f403:f000:: / 52
Microsoft
AS8075
193.19.178.128 / 27
Savvy s.r.o.
AS44770
193.19.178.159
Savvy s.r.o.
AS44770
193.19.178.162
Savvy s.r.o.
AS44770
37.46.82.0 / 28
Webglobe, s.r.o.
AS29134
130.193.9.208 / 28
Webglobe, s.r.o.
AS29134
130.193.12.56
dogado
AS8648
193.19.178.96 / 27
Savvy s.r.o.
AS44770
37.46.82.240 / 28
Webglobe, s.r.o.
AS29134
45.76.88.183
The Constant Company
AS20473
45.77.53.19
The Constant Company
AS20473
104.207.131.63
The Constant Company
AS20473
130.193.10.92
dogado
AS8648
37.157.195.119
WEDOS Internet, a.s.
AS197019
37.46.80.113
dogado
AS8648
37.157.198.12
WEDOS Internet, a.s.
AS197019
139.162.160.87
Akamai Connected Cloud
AS63949
139.162.238.27
Akamai Connected Cloud
AS63949
37.157.197.190
WEDOS Internet, a.s.
AS197019
2a02:2b88:2:1::4a1d:1
WEDOS Internet, a.s.
AS197019
2a02:2b88:2:1::4b41:1
WEDOS Internet, a.s.
AS197019
2a03:b0c0:3:d0::f:b001
DigitalOcean
AS14061
109.123.217.128 / 25
CASABLANCA INT a.s.
AS15685
83.167.240.128 / 25
MasterDC s.r.o.
AS24971
46.234.109.128 / 25
SH.cz s.r.o.
AS39392
45.63.116.226
The Constant Company
AS20473
45.76.87.101
The Constant Company
AS20473
45.76.88.107
The Constant Company
AS20473
46.101.167.208
DigitalOcean
AS14061
37.46.82.160 / 27
Webglobe, s.r.o.
AS29134
37.46.80.136
dogado
AS8648
130.193.14.240 / 28
Webglobe, s.r.o.
AS29134
130.193.14.192 / 28
Webglobe, s.r.o.
AS29134
130.193.12.157
dogado
AS8648
130.193.14.128 / 28
Webglobe, s.r.o.
AS29134
130.193.14.176 / 28
Webglobe, s.r.o.
AS29134
130.193.10.185
dogado
AS8648
40.92.0.0 / 15
Microsoft
AS8075
40.107.0.0 / 16
Microsoft
AS8075
52.100.0.0 / 15
Microsoft
AS8075
52.102.0.0 / 16
Microsoft
AS8075
52.103.0.0 / 17
Microsoft
AS8075
104.47.0.0 / 17
Microsoft
AS8075
2a01:111:f400:: / 48
Microsoft
AS8075
2a01:111:f403:: / 49
Microsoft
AS8075
2a01:111:f403:8000:: / 51
Microsoft
AS8075
2a01:111:f403:c000:: / 51
Microsoft
AS8075
2a01:111:f403:f000:: / 52
Microsoft
AS8075
217.16.183.28
VSHosting s.r.o.
AS43541