4 / 10
Lookups
1
Issue
484,898
IPv4 addresses
2.19 ⋅ 10
24
IPv6 addresses
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable.
v=spf1 a ptr ip4:202.130.35.112/28 ip4:202.130.33.144/28 include:spf.protection.outlook.com include:mail.zendesk.com ~all
Copied
Terms
a
pass
if the sender's IP address is in the A or AAAA record of this domain.
2 IPv4 addresses
2 IPv6 addresses
or else
PTR checks should no longer be used. See
RFC 7208, section 5.5
.
or else
ip4:
202.130.35.112 / 28
pass
if the sender's IP is between
202.130.35.112 and 202.130.35.127 (inclusive).
202.130.35.112 and 202.130.35.127 (inclusive).
Wholesale Services Provider
AS45671
or else
ip4:
202.130.33.144 / 28
pass
if the sender's IP is between
202.130.33.144 and 202.130.33.159 (inclusive).
202.130.33.144 and 202.130.33.159 (inclusive).
Wholesale Services Provider
AS45671
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:
mail.zendesk.com
Evaluate this SPF record and
pass
if it
passes.
This include does nothing if the included record returns fail, soft fail, or neutral.
Zendesk
Helpdesk
or else
~all
soft fail
the email's SPF check.
Included records
v=spf1 a ptr ip4:202.130.35.112/28 ip4:202.130.33.144/28 include:spf.protection.outlook.com include:mail.zendesk.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
5 x ip4 ~all
IP ranges
202.130.35.112
/ 28
Wholesale Services Provider
AS45671
202.130.35.112 - 202.130.35.127
16 IP addresses
202.130.33.144
/ 28
Wholesale Services Provider
AS45671
202.130.33.144 - 202.130.33.159
16 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
