9 / 10
Lookups
0
Issues
545,082
IPv4 addresses
2.19 ⋅ 10
24
IPv6 addresses
v=spf1 include:spf1.ctstelecom.com include:spf2.ctstelecom.com include:spf.protection.outlook.com include:spf.us.exclaimer.net include:servers.mcsv.net include:_phishspf.knowbe4.com -all
Copied
Terms
include:
spf1.ctstelecom.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:
spf2.ctstelecom.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
include:
spf.us.exclaimer.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:
servers.mcsv.net
Evaluate this SPF record and
pass
if it
passes.
This include does nothing if the included record returns fail, soft fail, or neutral.
MailChimp
Email marketing
or else
include:
_phishspf.knowbe4.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
-all
fail
the email's SPF check.
Included records
v=spf1 include:spf1.ctstelecom.com include:spf2.ctstelecom.com include:spf.protection.outlook.com include:spf.us.exclaimer.net include:servers.mcsv.net include:_phishspf.knowbe4.com -all
mx 8 x ip4 -all
4 x ip4 a:mx1.dnn4less.com a:eg02.mxguardian.net -all
6 x ip4 5 x ip6 -all
6 x ip4 ~all
3 x ip4 -all
6 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