4 / 10
Lookups
1
Issue
4
IPv4 addresses
0
IPv6 addresses
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable.
Terms
mx
pass
if the sender's IP address is in the A or AAAA record of this domain.
1 IPv4 address
or else
a
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.leniwiec.biz
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
fail
the email's SPF check.
Included records
v=spf1 mx a ptr include:_spf.leniwiec.biz -all
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable
2 x ip4 -all