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Lookups
1
Issue
320
IPv4 addresses
0
IPv6 addresses
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable.
Terms
ip4:
66.77.65.128 / 26
pass
if the sender's IP is between
66.77.65.128 and 66.77.65.191 (inclusive).
66.77.65.128 and 66.77.65.191 (inclusive).
CenturyLink Communications
AS209
or else
ip4:
65.123.29.0 / 24
pass
if the sender's IP is between
65.123.29.0 and 65.123.29.255 (inclusive).
65.123.29.0 and 65.123.29.255 (inclusive).
PR Newswire
AS21622
or else
PTR checks should no longer be used. See
RFC 7208, section 5.5
.
or else
-all
fail
the email's SPF check.
Included records
v=spf1 ip4:66.77.65.128/26 ip4:65.123.29.0/24 ptr -all
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable