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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:
.
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