8 / 10
Lookups
0
Issues
603,098
IPv4 addresses
1.49 â‹… 10
28
IPv6 addresses
v=spf1 include:spf.uchicago.edu include:_spf.google.com include:spf.protection.outlook.com include:mailgun.org ip4:128.135.181.0/24 ip4:128.135.156.0/24 ip4:128.135.53.0/24 ~all
Copied
Terms
include:
spf.uchicago.edu
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.google.com
Evaluate this SPF record and
pass
if it
passes.
This include does nothing if the included record returns fail, soft fail, or neutral.
Gmail
Inbox software
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
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
ip4:
128.135.181.0 / 24
pass
if the sender's IP is between
128.135.181.0 and 128.135.181.255 (inclusive).
128.135.181.0 and 128.135.181.255 (inclusive).
The University of Chicago
AS160
or else
ip4:
128.135.156.0 / 24
pass
if the sender's IP is between
128.135.156.0 and 128.135.156.255 (inclusive).
128.135.156.0 and 128.135.156.255 (inclusive).
The University of Chicago
AS160
or else
ip4:
128.135.53.0 / 24
pass
if the sender's IP is between
128.135.53.0 and 128.135.53.255 (inclusive).
128.135.53.0 and 128.135.53.255 (inclusive).
The University of Chicago
AS160
or else
~all
soft fail
the email's SPF check.
Included records
v=spf1 include:spf.uchicago.edu include:_spf.google.com include:spf.protection.outlook.com include:mailgun.org ip4:128.135.181.0/24 ip4:128.135.156.0/24 ip4:128.135.53.0/24 ~all
4 x ip4 ?all
2 x ip4 6 x ip6 ~all
6 x ip4 5 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
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