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Lookups
1
Issue
4,388
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 ip4:72.52.99.128/27 ip4:216.37.42.0/24 include:relay.mailchannels.net ~all
Copied
Terms
a
pass
if the sender's IP address is in the A or AAAA record of this domain.
1 IPv4 address
or else
mx
pass
if the sender's IP address is in the A or AAAA record of this domain.
2 IPv4 addresses
or else
ptr:
.
PTR checks should no longer be used. See
RFC 7208, section 5.5
.
or else
ip4:
72.52.99.128 / 27
pass
if the sender's IP is between
72.52.99.128 and 72.52.99.159 (inclusive).
72.52.99.128 and 72.52.99.159 (inclusive).
Hurricane Electric
AS6939
or else
ip4:
216.37.42.0 / 24
pass
if the sender's IP is between
216.37.42.0 and 216.37.42.255 (inclusive).
216.37.42.0 and 216.37.42.255 (inclusive).
Expedient
AS17054
or else
include:
relay.mailchannels.net
Evaluate this SPF record and
pass
if it
passes.
This include does nothing if the included record returns fail, soft fail, or neutral.
MailChannels
Inbox software
or else
~all
soft fail
the email's SPF check.
Included records
v=spf1 a mx ptr ip4:72.52.99.128/27 ip4:216.37.42.0/24 include:relay.mailchannels.net ~all
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable
2 x ip4 ~all
