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Lookups
1
Issue
19
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 mx ptr ip4:64.111.17.16/28 ip6:2607:2800:102:203::/64 -all
Copied
Terms
mx
pass
if the sender's IP address is in the A or AAAA record of this domain.
3 IPv4 addresses
3 IPv6 addresses
or else
ptr:
.
PTR checks should no longer be used. See
RFC 7208, section 5.5
.
or else
ip4:
64.111.17.16 / 28
pass
if the sender's IP is between
64.111.17.16 and 64.111.17.31 (inclusive).
64.111.17.16 and 64.111.17.31 (inclusive).
Data102
AS33302
or else
ip6:
2607:2800:102:203:: / 64
pass
if the sender's IP is between
2607:2800:102:203:: and 2607:2800:102:203:ffff:ffff:ffff:ffff (inclusive).
2607:2800:102:203:: and 2607:2800:102:203:ffff:ffff:ffff:ffff (inclusive).
Data102
AS33302
or else
-all
fail
the email's SPF check.
Included records
v=spf1 mx ptr ip4:64.111.17.16/28 ip6:2607:2800:102:203::/64 -all
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable