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Lookups
1
Issue
133
IPv4 addresses
1.84 ⋅ 10
19
IPv6 addresses
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable.
v=spf1 a mx ptr ip4:216.110.227.128/26 ip4:68.69.147.0/26 ip4:66.240.181.6 ip6:2604:6400:0:1a::/64 ~all
Copied
Terms
a
pass
if the sender's IP address is in the A or AAAA record of this domain.
2 IPv4 addresses
or else
mx
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:
216.110.227.128 / 26
pass
if the sender's IP is between
216.110.227.128 and 216.110.227.191 (inclusive).
216.110.227.128 and 216.110.227.191 (inclusive).
Wightman Telecom
AS29974
or else
ip4:
68.69.147.0 / 26
pass
if the sender's IP is between
68.69.147.0 and 68.69.147.63 (inclusive).
68.69.147.0 and 68.69.147.63 (inclusive).
Wightman Telecom
AS29974
or else
ip4:
66.240.181.6 / 32
pass
if the sender's IP is between
66.240.181.6 and 66.240.181.6 (inclusive).
66.240.181.6 and 66.240.181.6 (inclusive).
OnX Enterprise Solutions
AS23136
or else
ip6:
2604:6400:0:1a:: / 64
pass
if the sender's IP is between
2604:6400:0:1a:: and 2604:6400:0:1a:ffff:ffff:ffff:ffff (inclusive).
2604:6400:0:1a:: and 2604:6400:0:1a:ffff:ffff:ffff:ffff (inclusive).
Wightman Telecom
AS29974
or else
~all
soft fail
the email's SPF check.
Included records
v=spf1 a mx ptr ip4:216.110.227.128/26 ip4:68.69.147.0/26 ip4:66.240.181.6 ip6:2604:6400:0:1a::/64 ~all
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable