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Lookups
1
Issue
772
IPv4 addresses
0
IPv6 addresses
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable.
v=spf1 a mx ptr ip4:203.211.152.0/24 ip4:210.193.2.0/23 mx:mail.m1net.sg -all
Copied
Terms
a
pass
if the sender's IP address is in the A or AAAA record of this domain.
3 IPv4 addresses
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:
203.211.152.0 / 24
pass
if the sender's IP is between
203.211.152.0 and 203.211.152.255 (inclusive).
203.211.152.0 and 203.211.152.255 (inclusive).
M1 NET
AS17547
or else
ip4:
210.193.2.0 / 23
pass
if the sender's IP is between
210.193.2.0 and 210.193.3.255 (inclusive).
210.193.2.0 and 210.193.3.255 (inclusive).
M1 NET
AS17547
or else
or else
-all
fail
the email's SPF check.
Included records
v=spf1 a mx ptr ip4:203.211.152.0/24 ip4:210.193.2.0/23 mx:mail.m1net.sg -all
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable