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Lookups
1
Issue
12,290
IPv4 addresses
1
IPv6 address
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
1 IPv6 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
ip4:
77.220.64.0 / 19
pass
if the sender's IP is between
77.220.64.0 and 77.220.95.255 (inclusive).
77.220.64.0 and 77.220.95.255 (inclusive).
Internet one SRL
AS5398
or else
ip4:
31.44.32.0 / 20
pass
if the sender's IP is between
31.44.32.0 and 31.44.47.255 (inclusive).
31.44.32.0 and 31.44.47.255 (inclusive).
Internet one SRL
AS5398
or else
-all
fail
the email's SPF check.
Included records
v=spf1 mx a ptr ip4:77.220.64.0/19 ip4:31.44.32.0/20 -all
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable