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Lookups
1
Issue
44,762
IPv4 addresses
0
IPv6 addresses
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.
2 IPv4 addresses
or else
PTR checks should no longer be used. See
RFC 7208, section 5.5
.
or else
ip4:
50.21.229.0 / 24
pass
if the sender's IP is between
50.21.229.0 and 50.21.229.255 (inclusive).
50.21.229.0 and 50.21.229.255 (inclusive).
TELUS Communications
AS852
or else
include:
mailgun.org
Evaluate this SPF record and
pass
if it
passes.
This include does nothing if the included record returns fail, soft fail, or neutral.
MailGun
Email automation
or else
~all
soft fail
the email's SPF check.
Included records
v=spf1 mx ptr ip4:50.21.229.0/24 include:mailgun.org ~all
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable
include:_spf.mailgun.org include:_spf.eu.mailgun.org -all
include:_spf1.mailgun.org include:_spf2.mailgun.org ~all
10 x ip4 ~all
9 x ip4 ~all
11 x ip4 ~all