outboundemail.skytouchhos.com SPF record

4 / 10 Lookups
2 Issues
458,756 IPv4 addresses
2.19 ⋅ 10 24 IPv6 addresses

There are 2 issues with this SPF record

  • The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable.
  • MX host outboundemail-skytouchhos-com.mail.protection.outlook.com has no A/AAAA records, so this SPF term could not be expanded into IP addresses.
v=spf1 a mx ptr ip4:192.61.136.222 ip4:52.26.18.86 ip4:104.239.217.173 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
or else
mx
pass if the sender's IP address is in the A or AAAA record of this domain.
or else
ptr:
PTR checks should no longer be used. See RFC 7208, section 5.5 .
or else
ip4:
192.61.136.222 / 32
pass if the sender's IP is between
192.61.136.222 and 192.61.136.222 (inclusive).
Charter Communications
AS12271
or else
ip4:
52.26.18.86 / 32
pass if the sender's IP is between
52.26.18.86 and 52.26.18.86 (inclusive).
Amazon.com
AS16509
or else
ip4:
104.239.217.173 / 32
pass if the sender's IP is between
104.239.217.173 and 104.239.217.173 (inclusive).
Rackspace Hosting
AS19994
or else
include:
spf.protection.outlook.com
Evaluate this SPF record and pass if it
passes.
Microsoft 365 / Outlook
Inbox software
or else
~all
soft fail the email's SPF check.

Included records

v=spf1 a mx ptr ip4:192.61.136.222 ip4:52.26.18.86 ip4:104.239.217.173 include:spf.protection.outlook.com ~all
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable
6 x ip4 5 x ip6 -all

IP ranges

52.26.18.86
Amazon.com
AS16509
192.61.136.222
Charter Communications
AS12271
52.26.18.86
Amazon.com
AS16509
104.239.217.173
Rackspace Hosting
AS19994
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