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1
Issue
2
IPv4 addresses
0
IPv6 addresses
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable.
v=spf1 ip4:64.56.194.142 ip4:64.56.194.146 include:spf.frontbridge.com -all
Copied
Terms
ip4:
64.56.194.142 / 32
pass
if the sender's IP is between
64.56.194.142 and 64.56.194.142 (inclusive).
64.56.194.142 and 64.56.194.142 (inclusive).
CenturyLink Communications
AS3561
or else
ip4:
64.56.194.146 / 32
pass
if the sender's IP is between
64.56.194.146 and 64.56.194.146 (inclusive).
64.56.194.146 and 64.56.194.146 (inclusive).
CenturyLink Communications
AS3561
or else
include:
spf.frontbridge.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 ip4:64.56.194.142 ip4:64.56.194.146 include:spf.frontbridge.com -all
ptr:protection.outlook.com ptr:messaging.microsoft.com ptr:o365filtering.com -all
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable