5 / 10
Lookups
0
Issues
458,897
IPv4 addresses
2.19 ⋅ 10
24
IPv6 addresses
v=spf1 ip4:38.98.151.72 include:internalspf.backstopsolutions.com include:clientspf.backstopsolutions.com include:spf.protection.outlook.com a mx ~all
Copied
Terms
ip4:
38.98.151.72 / 32
pass
if the sender's IP is between
38.98.151.72 and 38.98.151.72 (inclusive).
38.98.151.72 and 38.98.151.72 (inclusive).
Cogent Communications
AS174
or else
include:
internalspf.backstopsolutions.com
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
include:
clientspf.backstopsolutions.com
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
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
a
pass
if the sender's IP address is in the A or AAAA record of this domain.
2 IPv4 addresses
or else
mx
pass
if the sender's IP address is in the A or AAAA record of this domain.
4 IPv4 addresses
or else
~all
soft fail
the email's SPF check.
Included records
v=spf1 ip4:38.98.151.72 include:internalspf.backstopsolutions.com include:clientspf.backstopsolutions.com include:spf.protection.outlook.com a mx ~all
3 x ip4 ~all
8 x ip4 ~all
6 x ip4 5 x ip6 -all
IP ranges
216.34.183.128
/ 25
CenturyLink Communications
AS3561
216.34.183.128 - 216.34.183.255
128 IP addresses
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