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Lookups
1
Issue
1,024
IPv4 addresses
0
IPv6 addresses
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable.
Terms
PTR checks should no longer be used. See
RFC 7208, section 5.5
.
or else
ip4:
203.27.226.0 / 23
pass
if the sender's IP is between
203.27.226.0 and 203.27.227.255 (inclusive).
203.27.226.0 and 203.27.227.255 (inclusive).
Amazon.com
AS16509
or else
ip4:
203.31.198.0 / 23
pass
if the sender's IP is between
203.31.198.0 and 203.31.199.255 (inclusive).
203.31.198.0 and 203.31.199.255 (inclusive).
or else
-all
fail
the email's SPF check.
Included records
v=spf1 ptr ip4:203.27.226.0/23 ip4:203.31.198.0/23 -all
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable