21 / 10
Lookups
1
Issue
1,030,411
IPv4 addresses
4.38 ⋅ 10
24
IPv6 addresses
More than 10 DNS lookups were required to process this SPF record.
v=spf1 a ip4:84.201.0.0/24 ip4:194.187.164.0/24 a:mx02.first-colo.net include:first-colo.net include:_spf4.first-colo.net include:_spf6.first-colo.net include:mailgun.org include:spf.protection.outlook.com -all
Copied
Terms
a
pass
if the sender's IP address is in the A or AAAA record of this domain.
1 IPv4 address
1 IPv6 address
or else
ip4:
84.201.0.0 / 24
pass
if the sender's IP is between
84.201.0.0 and 84.201.0.255 (inclusive).
84.201.0.0 and 84.201.0.255 (inclusive).
firstcolo
AS44066
or else
ip4:
194.187.164.0 / 24
pass
if the sender's IP is between
194.187.164.0 and 194.187.164.255 (inclusive).
194.187.164.0 and 194.187.164.255 (inclusive).
firstcolo
AS44066
or else
pass
if the sender's IP address is in the A or AAAA record of this domain.
1 IPv4 address
or else
include:
first-colo.net
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:
_spf4.first-colo.net
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:
_spf6.first-colo.net
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:
mailgun.org
Evaluate this SPF record and
pass
if it
passes.
This include does nothing if the included record returns fail, soft fail, or neutral.
MailGun
Email automation
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
-all
fail
the email's SPF check.
Included records
v=spf1 a ip4:84.201.0.0/24 ip4:194.187.164.0/24 a:mx02.first-colo.net include:first-colo.net include:_spf4.first-colo.net include:_spf6.first-colo.net include:mailgun.org include:spf.protection.outlook.com -all
More than 10 DNS lookups were required to process this SPF record
include:_spf4.firstcolo.net include:_spf6.firstcolo.net include:mailgun.org a:mx02.firstcolo.net include:spf.protection.outlook.com include:146015476.spf03.hubspotemail.net ~all
12 x ip4 ~all
9 x ip6 ~all
include:_spf.mailgun.org include:_spf.eu.mailgun.org -all
include:_spf1.mailgun.org include:_spf2.mailgun.org ~all
10 x ip4 ~all
9 x ip4 ~all
11 x ip4 ~all
6 x ip4 5 x ip6 -all
19 x ip4 -all
12 x ip4 ~all
9 x ip6 ~all
include:_spf.mailgun.org include:_spf.eu.mailgun.org -all
include:_spf1.mailgun.org include:_spf2.mailgun.org ~all
10 x ip4 ~all
9 x ip4 ~all
11 x ip4 ~all
6 x ip4 5 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
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