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1
Issue
98,851
IPv4 addresses
2.97 ⋅ 10
28
IPv6 addresses
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable.
v=spf1 a mx ptr include:_spf.google.com include:optimum.net ~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.
1 IPv4 address
or else
PTR checks should no longer be used. See
RFC 7208, section 5.5
.
or else
include:
_spf.google.com
Evaluate this SPF record and
pass
if it
passes.
This include does nothing if the included record returns fail, soft fail, or neutral.
Gmail
Inbox software
or else
include:
optimum.net
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
soft fail
the email's SPF check.
Included records
v=spf1 a mx ptr include:_spf.google.com include:optimum.net ~all
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable
2 x ip4 6 x ip6 ~all
3 x ip4 ~all