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Lookups
1
Issue
1
IPv4 address
0
IPv6 addresses
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable.
Terms
ip4:
177.190.199.253 / 32
pass
if the sender's IP is between
177.190.199.253 and 177.190.199.253 (inclusive).
177.190.199.253 and 177.190.199.253 (inclusive).
CTINET SOLUCOES EM CONECTIVIDADE E INFORMATICA
AS262731
or else
ptr:
fxo.com.br
PTR checks should no longer be used. See
RFC 7208, section 5.5
.
or else
-all
fail
the email's SPF check.
Included records
v=spf1 ip4:177.190.199.253 ptr:fxo.com.br -all
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable