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Lookups
1
Issue
3
IPv4 addresses
0
IPv6 addresses
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable.
Terms
a
pass
if the sender's IP address is in the A or AAAA record of this domain.
1 IPv4 address
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
ip4:
81.21.192.134 / 32
pass
if the sender's IP is between
81.21.192.134 and 81.21.192.134 (inclusive).
81.21.192.134 and 81.21.192.134 (inclusive).
Grupa KKI-BCI Sp. Z o.o.
AS8726
or else
-all
fail
the email's SPF check.
Included records
v=spf1 a mx ptr ip4:81.21.192.134 -all
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable