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Lookups
1
Issue
10,552
IPv4 addresses
0
IPv6 addresses
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable.
v=spf1 include:spf.smtp2go.com mx a ptr ip4:210.48.71.0/24 ip4:116.90.140.0/24 ip4:104.237.141.156/32 ip4:45.56.82.76/32 ip4:203.97.48.0/24 ip4:50.116.1.88/32 ip4:23.239.2.229/24 ip4:116.90.140.0/24 ip4:192.155.82.163/32 ip4:104.237.140.243/32 -all
Copied
Terms
include:
spf.smtp2go.com
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
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
ip4:
210.48.71.0 / 24
pass
if the sender's IP is between
210.48.71.0 and 210.48.71.255 (inclusive).
210.48.71.0 and 210.48.71.255 (inclusive).
ICONZ
AS4770
or else
ip4:
116.90.140.0 / 24
pass
if the sender's IP is between
116.90.140.0 and 116.90.140.255 (inclusive).
116.90.140.0 and 116.90.140.255 (inclusive).
Solarix Networks
AS38477
or else
ip4:
104.237.141.156 / 32
pass
if the sender's IP is between
104.237.141.156 and 104.237.141.156 (inclusive).
104.237.141.156 and 104.237.141.156 (inclusive).
Akamai Connected Cloud
AS63949
or else
ip4:
45.56.82.76 / 32
pass
if the sender's IP is between
45.56.82.76 and 45.56.82.76 (inclusive).
45.56.82.76 and 45.56.82.76 (inclusive).
Akamai Connected Cloud
AS63949
or else
ip4:
203.97.48.0 / 24
pass
if the sender's IP is between
203.97.48.0 and 203.97.48.255 (inclusive).
203.97.48.0 and 203.97.48.255 (inclusive).
One New Zealand Group
AS4768
or else
ip4:
50.116.1.88 / 32
pass
if the sender's IP is between
50.116.1.88 and 50.116.1.88 (inclusive).
50.116.1.88 and 50.116.1.88 (inclusive).
Akamai Connected Cloud
AS63949
or else
ip4:
23.239.2.229 / 24
pass
if the sender's IP is between
23.239.2.0 and 23.239.2.255 (inclusive).
23.239.2.0 and 23.239.2.255 (inclusive).
Akamai Connected Cloud
AS63949
or else
ip4:
116.90.140.0 / 24
pass
if the sender's IP is between
116.90.140.0 and 116.90.140.255 (inclusive).
116.90.140.0 and 116.90.140.255 (inclusive).
Solarix Networks
AS38477
or else
ip4:
192.155.82.163 / 32
pass
if the sender's IP is between
192.155.82.163 and 192.155.82.163 (inclusive).
192.155.82.163 and 192.155.82.163 (inclusive).
Akamai Connected Cloud
AS63949
or else
ip4:
104.237.140.243 / 32
pass
if the sender's IP is between
104.237.140.243 and 104.237.140.243 (inclusive).
104.237.140.243 and 104.237.140.243 (inclusive).
Akamai Connected Cloud
AS63949
or else
-all
fail
the email's SPF check.
Included records
v=spf1 include:spf.smtp2go.com mx a ptr ip4:210.48.71.0/24 ip4:116.90.140.0/24 ip4:104.237.141.156 ip4:45.56.82.76 ip4:203.97.48.0/24 ip4:50.116.1.88 ip4:23.239.2.229/24 ip4:116.90.140.0/24 ip4:192.155.82.163 ip4:104.237.140.243 -all
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable
10 x ip4 ~all
IP ranges
66.235.120.0
/ 21
Wholesale Services Provider
AS45671
66.235.120.0 - 66.235.127.255
2,048 IP addresses